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About

Steep Seeker was created with the intention of providing fellow skiers with a platform to easily and reliably compare trails between mountains. While ski resorts typically follow the standardized terms of “Green, Blue, Black, and Double Black Diamond” trails, what one ski resort deems as a black diamond may be very different from another resort. The standardized rating scale Steep Seeker utilizes aims to provide an all-encompassing rating across the board.

Want to join the community? Come chat about the slopes and get updates first.

Pitch (in degrees) Difficulty
0°-16° Beginner
16°-26° Intermediate
26°-36° Advanced
36°-46° Expert
46°+ Extreme Terrain
Attribute Pitch Modifier
Gladed +8°
Ungroomed / Moguls +5°
Hazardous +5°
Typical Weather Between +0° and +6°

How It Works

These maps were created using data collected from publicly available maps on OpenStreetMap and the USGS. The elevation data collected from the USGS allowed for the configuration of a 3D representation of each resort.

The colors that appear on the map are determined by the steepest 150 foot section of each trail and any modifiers that would increase or decrease difficulty. Information such as gladed trails, grooming, average accumulations of snow and rain at the resort, and frequency of freeze-thaw cycles were also taken into account when determining a trail’s rating.

The ratings and colors for each trail are based on the values listed in the tables on this page. These values were created through statistics to select values that minimize error. Furthermore, each value undergoes manual verification to ensure real world accuracy.

While Steep Steek prides itself on providing accurate data, one limitation to note is that the maps created can only be as accurate as the data collected from OpenStreetMap. Not all tags are correct, and not all trails are present or placed accurately. If you find tagging or routing errors, please either contact me and let me know what is incorrect, or correct the issues directly on OpenStreetMap. More information about correcting errors can be found in the Q & A section below.

Mountain Rankings

Mountain Rankings compare and contrast the most difficult of advanced trails and the easiest of novice trails. The rankings are created by using a weighted average of the top 30 difficult and novice trails in order to create a metric that provides data on how expert and beginner friendly a location is and how this data compares to other mountains.

20 percent of the rating is composed of the top 30 trails, and 80 percent comes from the top five trails in a particular area. These rankings can be identified with the color designated to each resort, which indicates how the difficult and novice trails are rated, and an actual score which can be used to compare resorts within the same difficulty color. Note that in order for a mountain to rate well, it cannot just have one standout run.

Q & A

Why only US resorts?

At the moment, the elevation map specs I need of 10m resolution or better, are not available for many countries. I hope to expand to other countries as better data becomes available, with Canada being top of my list.

What about X factor that changes a trail’s difficulty?

A large majority of the variance between different trails is explained by trail steepness and the existing modifiers, but not all of it. I have many ideas for potential factors to consider, but it is difficult to obtain the data needed to implement them.

What should you do if you find a mistake?

Given that the primary source for data is OpenStreetMaps, where individual users come together to crowdsource the map, trail quality can vary between resorts. The flip side to that is that anyone can improve the maps. If you know a resort well and are familiar with contributing to OpenStreetMap (or want to learn), it would be extremely helpful to have local knowledge to fix problems on a resort’s map. Once OpenStreetMap is updated, let me know, and I’ll refresh the map here. If you find a problem that is beyond what you are willing to fix there (or is a problem with my model/website), let me know and I’ll do my best to resolve it.

Join the Steepseeker Discord Server and let me know about any issues you encounter in the issues channel.

X feature is missing!

Reach out, I want to improve the site over time as I get feedback, and I need to know how the site can be better.

Join the Steepseeker Discord to tell me about what you want to see added in the feature-requests channel.

What was the inspiration?

I have always wanted a way to compare trails that was less subjective, and this grew out of a small project I started to see if that was possible. So far, I have thousands of hours invested in coding, model development, and website design. This is an ongoing project that I work on because I’m passionate about skiing and want to make it easier for people like myself to nerd out about statistics.

Who am I?

I am an avid skier and data scientist who grew up skiing and looks forward to every powder day. I combined my passion for skiing and background in data science to create this website and the related algorithms that drive it.

How can you help?

This project takes a fair bit of time to create and maintain, and hosting a website is far from free. If you have experience with editing OpenStreetMap, it would be extremely helpful if you could help by maintaining your local areas. When new trails get added to a resort, someone needs to add them to OSM, and I likely would not know that there is a new trail. Also, not every resort has all the trails added, and many are missing tags. For example, I’d love to have more resorts with proper tagging for moguls so I can add them to the model.

Stay Connected

Follow along for updates, or come chat about the slopes.

Changelog

V2.1 Oct 19 2026

Time for another update, this one focused on making the site feel better to use. First, the headline feature is the new popups on the interactive maps! Now integrating the heightgraph function into the popup and restructuring the layout for an improved appearance, it should be a more powerful tool with less visual clutter. The other main change this update is improved mobile support, with Search filters now available on mobile and the rankings pages minimizing their filters by default so you can better see the parts of the page you actually want to view. Beyond that, there’s a bunch of smaller UI/UX changes to hopefully make the site look and feel better to use, including a share button! Additionally, I’ve been working on adding support for an upcoming Steepseeker app, and parts of that are now live! You should be able to install Steepseeker as a standalone launcher on your home screen if your browser supports it, and view previously loaded pages even without internet access. Hopefully, I’ll have Steepseeker listed on the Google Play Store soon. If that goes well and there is interest, I’ll consider adding it to the iOS App Store too. I also updated a few mountains that were highlighted to me as needing another look, so expect slightly more accurate results too!

V2.0 Sep 29 2026

Big changes! Over the last year I have been working on a full rewrite of the backend to bring much needed code quality improvements as well as greater scalability to add new features and performance improvements. And at long last, it’s finally done! While the visuals of the site are largely similar, behind the scenes many things are different. Ratings have been overhauled, and difficulty is now defined by the steepest 150 feet (and all the steepest pitches being in feet is also new), and the ratings and modifiers have had their values tweaked to improve accuracy. Expect ratings to be broadly the same as before, but for sustained pitches to be slightly more important (the previous ratings were based on the steepest 30 meter or ~100 foot section). Beyond reweighting the importance of whether a trail is ungroomed or gladed, I also added in a new modifier: Hazardous. This is for trails that have extreme characteristics that don’t reflect in the current model like the entrance to Corbet’s Couloir. Expect very few trails to have this applied. Full change log (or as full as I can remember, so many little things to remember over 1 year of work):

  • New backend
  • Vastly improved workflow for updating/modifying resorts (helps me update mountains faster, cutting the time needed to refresh all the resorts from over a week of solid work to one day)
  • New Ratings weightings
  • Hazardous modifier
  • More information about Lifts on Lift Rankings
  • Improved interactive map performance
  • Improved readability of interactive map labels & added difficulty symbols
  • You can now click on trails on the mountain sidebar and have them be highlighted on the interactive map
  • Clicking a trail on the trail rankings page now opens the map with the trail highlighted
  • Brought in some help from a professional to help word smith some of my writing, thanks again Rhiannon for your help!
  • Lots of small UI/UX tweaks
  • Refreshed all the mountains for the new season! (And had to do it twice because I may have messed up and lost the original copy…)

Now that I have this off my plate, I can redirect more of my focus to implementing the fun features! Expect lots more where this came from, with hopefully much less lag time between now and the next update!

v1.20 Feb 16 2026

You may have noticed a few things trickling onto the site over the last month or so as I made small changes, but now I have enough to warrant an actual update. The headline thing is changes to maps! First, you may have already noticed that the default map type is now the interactive maps. After putting out a poll a few weeks ago, you all overwhelmingly said that the interactive maps are better so now you don't have to click an extra button if you want to see them! Another headlining change is there are now satellite maps! On the top right of the interactive maps, you will now find a toggle to enable satellite or topo basemaps. Other smaller changes include bringing some work I did for the interactive maps back to the static maps like adding the mountain details screen on mobile and other smaller UI/UX tweaks. In addition, there are more new mountains bringing the total to 329! Expect more resorts to be added soon as I also streamlined the process for adding more! Thank you to everyone who filled out the survey I put out, it was very helpful to get feedback from everyone and I do plan on implementing more changes based on what I heard. Consider this to be the first update taking that advice into account. As for everyone using the site, thank you! We are continuing to see more and more daily users, and I'd love to see more people check out this project so I've been very glad to see record usage!

v1.11 Dec 15 2025

Lots of little things this time around, from small UI/UX improvements to large changes in how the interactive map pages look. I also updated a few of the resorts with more accurate trails. Behind the scenes, I added some features to make refreshing a resort faster and some bug fixes. In general, this update is alot of quality of life improvements, but not much in the way of big changes.

v1.10 Nov 3 2025

A few small changes in the lead up to the season (yeah, I know a few of you have been lucky enough to get on snow already). First, and most important, there are now state level filters on the mountain, trail, and lift rankings. Have fun filtering in yet more ways now. Next, thanks to one of the users of our discord for a very through spreadsheet cataloging differences between the trails on Steepseeker and the official maps for all the resorts in Vermont, I have gone through and improved many of those maps (more to follow -- it's a slow task). Finally, I implemented some performance improvement for the ads. Not the most fun thing, but hopefully improves their existence just a bit. Lots more coming up, just need to carve out the time for all the coding!

v1.09 Oct 13 2025

It's been a minute, but it's time for all the mountains to get updated for the upcoming season! All 326 resorts have new trail data and maps resulting in nearly 1000 new trails that are now indexed in Steepseeker! Thank you to anyone who has contributed to OpenStreetMaps over the last few months (and years) as Steepseeker is only as good as the underlying data! For easy reference, every ski resort now has the mountain's official url linked on the map page if you want to quickly reference official information on the mountain. Expect some refinements to the new maps as I go through and fix some mountains that have been flagged by users as lacking proper tags for ungroomed trails and the like.

I've been working on a major rewrite of the whole backend underpinning the website, and while I was hoping it would be ready for prime time before this season, I haven't had enough time to devote to this project for it to be ready yet. Just know that there are big things in motion that should lead to a more accurate ranking algorithm and significantly easier codebase to expand upon for upcoming features. I have some exciting stuff planned, so stay tuned. Hopefully I'll have a little more time to work now that we are into fall.

v1.08 Jan 24 2025

New Year, more updates! The big new feature this time around is an elevation profile of each trail on the interactive maps. Whenever a trail or lift is selected, click on the elevation graph button at the bottom of the map to see finer details about the topography of the trail in question. This is a great tool for those who want to over-analyze everything, or for those trying to visualize why a trail gets the rating it does. There are two different charts to look at: one showing the rated difficulty for each section of trail, and one that shows the raw pitch of the slope with no difficulty modifiers applied. In addition, I've made a bunch of smaller UI/UX tweaks to improve the site experience, and some behind the scenes changes to make the website play nicer with search engines and the like.

As for upcoming changes, all the stuff I mentioned back in December is still in the works, but the elevation profiles turned into a bigger lift than expected. I'm really happy with how they turned out, and I hope others find them helpful too!

v1.07 Dec 26 2024

Small update this time around, primaryly addressing a few bugs and adding some UI/UX improvements. I now have calculated the average pitch for all lifts, so if you want to go find the best lift to rack up tons of vertical you now have an easy way to do that. While I have kept away from running advertisements up until this point, the site is taking off to the point that my webhosting costs are rising, and to cover those additional expenses I will be serving advertisements. For those of you who despise ads (I'm not much of a fan myself), I won’t be offended if you want to run adblock. I'll do my best to keep them from being too intrusive.

v1.06 Dec 18 2024

Tons of little, and some not so little improvements over the past month. The biggest changes came to the Explore Maps page (formerly the Explore page). Firstoff, the page was renamed since despite it being one of my favorite pages it isn't frequently visted. I'm hoping a more descriptive name will help others take a look. Also, the page is now vastly more useful with the mountain names being always visible meaning that you no longer have to play whack-a-mole clicking on icons to find one particular mountain on the map. The other big change is that I now show what multi-mountain season passes each resort has agreements with, so now you don't need to go elsewhere to see if a certain resort is part of your pass. Beyond that, the Lift Rankings page recieved a facelift and more information: I now show which chairlifts have a bubble on them. There are also a number of smaller UI/UX tweaks scattered across the site.

Expect more changes in the near future, the next update will likely contain lots of new ways to filter the rankings pages and the Explore Map screen. I'm also working on some backend tools to make adding new resorts easier, so expect me to go on the hunt for more places to add soon.

v1.05 Nov 18 2024

Back in September as part of my yearly refresh of all resort data and maps, I started cataloging more information about each lift, including how many people per chair, ride time, whether it has a bubble or heat and those sorts of things. While that information has been available since then, this is the first update to do more than just show this information on the interactive maps. Now, there is a whole new page for lift rankings! Expect more to follow, as it is still pretty bare bones.

Behind the scenes, quite a bit has happened. In my September update I reworked my backend tools to make updating resorts and fixing errors much easier, and with this update I made some significant changes to the database to allow for easier debugging of issues as well as laying the groundwork for some future features. Unfortunately, this lead to some annoying issues when deploying to the production server leading to an hour of downtime while I troubleshooted file permission issues. Also included in the update are some small bug fixes. Expect more to follow, a good chunk of this update was backend work that won't payoff until later features come!

v1.04 Sep 25 2024

Yearly refresh time! All resorts have fresh data and maps. Significant changes made to my backend tools to vastly improve the efficiency of updating resorts and fixing data errors. The interactive maps now have more to say about each lift! Things like how many people per chair and whether there is a bubble or heat on the chair are now displayed in the popups, and this information will get rolled into more features in a later update.

v1.03 Mar 09 2024

Mainly small improvements and some back end bug fixes. Improved performance of interactive maps, especially for larger resorts. Added a handful of new resorts, bringing the total to 327. One of those is especially noteworthy (Whistler Blackcomb) as it marks a trial into whether I can get sufficiently accurate results from Canadian elevation data. If everything checks out, I will look to add more Canadian resorts in the near future, with a goal of similar levels of coverage as the US by next season.

v1.02 Feb 22 2024

Couple big changes this release, mainly to the interactive maps. New stuff includes:

  • Added user location button to explore page & interactive maps
  • Added map rotation button to interactive maps and now interactive maps are rotated to match the static maps by default
  • Added basic labels to all trails and lifts on the interactive maps without having to click on the line
  • Unified button appearance throughout website
  • Added another ski area bringing total to 322
  • Improved trail placement accuracy on OSM for a number of resorts. This resulted in a few changes to the rankings

v1.01 Feb 02 2024

Small tweaks to UI/UX. Added the Discord server to the about page.

v1.0 Jan 25 2024

At some point, I need to consider this project “done” even though I have many plans for upcoming features. This seems as good a point as any to consider the end of the first major revision. New in this release are:

  • Improved mobile menus
  • Added 40 ski resorts bringing the total to 321
  • Refreshed all existing ski area maps (live as of late December)
  • Added interactive maps (accessible as of early December)
  • Added explore page (accessible as of early December)
  • Small UI/UX improvements
  • Bug fixes

Expect more changes in the coming months, I have many ideas that I plan on implementing. If there is something you want to see, let me know! I’m much more likely to implement something that I know other people want. Going forward, expect this changelog to reflect changes and improvements as I make them.