Sun Exposure on Every Crag Page

You can now see real-time sun exposure on every crag detail page in BETA.

For crags with a single dominant wall direction (Index, Exit 38, Peshastin, Castle Rock, Little Si, Vantage, The Chief), you'll see whether the wall is currently in sun or shade, plus when that flips:

For crags with walls facing multiple directions (Leavenworth, Mt. Erie, Smith Rock, Smoke Bluffs, Miller River), BETA shows you where the sun is in the sky right now:

If you know the crag, you know which sectors face which way. The sun position fills in the rest.

Why this matters

You're checking conditions at 2 PM, deciding whether to drive out to Index. The precip numbers look good, humidity is dropping, but is the wall still going to have sun when you get there at 4? Now you know. And you know when it goes into shade so you can plan accordingly.

Sun exposure also affects drying. A wall that's been baking in direct sun all afternoon is going to be in better shape than one that's been in the shadows since morning. This pairs with the precip and humidity data already on every crag page.

How it works (the short version)

Given a location and the current time, you can calculate exactly where the sun is in the sky. That's just math. Combine that with which direction the wall faces, and you get a sun or shade answer.

No weather API involved. No data that goes stale. It recalculates every 5 minutes based on the actual solar position at each crag's coordinates. Works on your phone, works offline, works at 2 AM if you're planning tomorrow's session.

What's next

The five "mixed aspect" crags will eventually get sector-level detail, so instead of just sun position, you'd see something like "Morning Rock: shade / Dihedrals: sun" for Smith Rock. That takes more data curation but the foundation is already there.

Check it out on any crag page: beta.trenigma.dev