Mountain bike trail conditions · Crested Butte, CO
Trails are dry, excuses aren't.
Sitting in the Crested Butte region of CO, Hartman Rocks is defined by its fast-draining soil and flat, exposed ground. Those traits, more than the forecast alone, drive when this network is actually rideable.
Hartman Rocks’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.
Open terrain gets direct sun and wind from all sides, which speeds evaporation significantly. Exposed trails are usually the fastest to rebound after rain — a bright, breezy afternoon can make a big difference.
Flat trails have nowhere for water to go. Low spots and natural depressions collect standing water and mud that lingers well after the rain stops, so these networks often stay wet longer than the weather alone suggests.
Slopes here are predominantly east-facing, with about 28% 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 Hartman Rocks turns rideable. Watch up to 3 networks free — no account needed.
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As of the latest update, Hartman Rocks is Rideable now (PRIME). Trails are dry, excuses aren't. No measurable rain in the past week.
Hartman Rocks 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, Hartman Rocks typically takes only a few hours to recover after light rain, and its flat terrain can hold water longer in low spots.
Yes — Hartman Rocks is in a continental 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.