Regions are shaded by their best open trail for the day picked on the right. Click a region or pin to see its trails.
Estimated from county rain gauges, blended between them. Change the period with the buttons on the Wettest gauges chart. Hover for a reading; check "Gauges" to mark each one (orange = yours).
Base reflectivity loop from the National Weather Service. Refreshes every 5 minutes.
Trail conditions
Wettest gauges
All gauges
Star a gauge to pin it to the top. Data: San Diego County ALERT Flood Warning System (OneRain).
How Hero Dirt works
For each trail system we track how much water is in the top layer of dirt, hour by hour. Rain comes from the San Diego County rain gauges nearest the trail. Drying comes from sun, wind, temperature and humidity (Open-Meteo), at a speed calibrated to the SDMBA Wet Trail Ratings. The same calculation runs forward over the forecast for the next week.
How it learns: every rider report is compared with what we predicted. If riders keep reporting mud when we said "good", that trail is marked as slower to dry, and future predictions adjust. Confidence rises as reports come in.
Closures win. Trails closed by a land manager, or very likely closed under a published rain rule, show in red. Riding wet trails damages them and costs everyone access — always check the official status link before you go.