Mountain bike trail conditions · Bay Area, CA
Trails are dry, excuses aren't.
Sweeney Ridge (Bay Area, CA) pairs fast-draining soil with rolling, partial shade terrain. Loam reads that profile against live weather to call conditions here instead of guessing from a regional forecast.
Sweeney Ridge’s drying behavior comes down to what Loam measures for this exact location:
Sandy and coarse-grained soils shed water quickly — excess moisture drains down through the soil profile rather than pooling on the surface. Trails on fast-draining soil can recover within hours of light rain, making them some of the most resilient riding around.
A mix of shaded and open sections. Sun-exposed stretches dry quickly while tree-covered sections hold moisture longer, so conditions can vary noticeably across the network — rideable in one zone, still damp in another.
Rolling terrain drains reasonably well and tends to be forgiving in variable conditions — enough gradient to shed water without the consequences of steeper ground.
Slopes here are predominantly northeast-facing, with about 35% rock fragment content in the soil — a factor in how fast the surface sheds water and dries.
Loam is a free app for iPhone. Open it for a one-tap rideability verdict and get a push notification the moment Sweeney Ridge turns rideable. Watch up to 3 networks free — no account needed.
Free download · Requires iPhone (iOS). Android not yet available.
As of the latest update, Sweeney Ridge is Rideable now (PRIME). Trails are dry, excuses aren't. No measurable rain in the past week.
Sweeney Ridge sits on fast-draining ground (Sandy / coarse soil). Sandy and coarse-grained soils shed water quickly — excess moisture drains down through the soil profile rather than pooling on the surface. Trails on fast-draining soil can recover within hours of light rain, making them some of the most resilient riding around.
On its fast-draining soil, Sweeney Ridge typically takes only a few hours to recover after light rain, and its rolling terrain helps shed water.
Yes — Sweeney Ridge is in a maritime snow climate, so winter riding can be limited by snowpack or freeze-thaw. Loam flags a FROZEN state when the ground is snow-covered or frozen.