Big Route Weather

Condition grades for big objectives

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About Big Route Weather

Why I made this

I wanted a place I could check any day and have an idea of whether a route I wanted to do in the mountains was doable. As awesome as apps like Windy and MountainForecast are, you've still gotta sort through quite a few details to really have a good idea if the weather is solid. They're also pretty complex with tons of features.

So I built this. Each card grades a route (from A - F) on the conditions that matter that day. This typically includes precipitation, wind, temperature, snowpack, and visibility. I roll them into a single overall score across 12h, 24h, and 48h windows. Click into any route for the breakdown.

What's coming

Today's coverage is Colorado-heavy. The plan is to keep adding peaks, ranges, and trails across the US. Immediate plans are for the Cascades, Tetons, Wasatch, and Sierras, but I'll be adding plenty more after that. If there's something you want graded, shoot me an email.

Where the data comes from

  • NWS forecast grids — daily and short-term outlooks tied to each route's coordinates.
  • NWS hourly — finer-grained data driving the short and near windows.
  • SNOTEL — the nearest station for snowpack depth, SWE, and recent trends.

The grade is the model's read on these signals. It's not a substitute for your own judgement, partner conversations, or turning around when something feels off. Please take these as a suggestion. Just because the precip chance is 5% doesn't mean you won't find yourself in a downpour!

Feedback

Want a route added? Find an issue? Want to talk routes/climbing?