Loam
Mud is the main risk here
Ridge to Rivers says riding muddy trails is the leading cause of trail damage on its system. Riders who go around mud trample the edges and widen the singletrack, and that damage is hard for crews to repair. Its guidance is simple: stay off muddy trails, and if you are leaving tracks, turn back. If you hit a short muddy stretch, ride through it rather than off the trail. The full guidance is on the Ridge to Rivers wet weather and winter trail use page. For why ruts last, see why riding soft trails causes damage.
What affects drying time
Clay and sand
Ridge to Rivers lists sandier trails as good bets on marginal days and higher-clay trails to avoid. Two trails a few miles apart can be very different after the same storm.
Frozen mornings
In winter, Ridge to Rivers suggests riding early while trails are frozen. Once the sun thaws the surface, frozen ground can turn soft. Read the freeze-thaw guide.
Elevation
The tracked Boise area runs from about 830m in the valley to about 2258m at Bogus Basin. Higher trails hold snow and stay wet longer than the lower foothills.
Before you ride
Check the Ridge to Rivers condition reports before you leave. On wet days, the all-weather trails list names trails that hold up in almost every condition, and the same page suggests the Boise Greenbelt as another option.
Loam estimates conditions from recent weather, soil, terrain, and tree cover. Use the network pages below to check the latest estimate, then use the trailhead firmness check when you arrive.
Boise trail conditions
Bogus Basin and the trails above it sit far higher than the foothills and follow a different season. See every network on the Boise conditions page.
0% tree cover near the mapped location. Slope: 8.3°. Elevation: 1494m.
11% tree cover near the mapped location. Slope: 2.1°. Elevation: 878m.
Over 700 acres next to downtown, with a bike skills park.
Steep trails reached from the Old Penitentiary trailhead.
Directional trails off Bogus Basin Road, opened in 2023.
Gentle singletrack managed by the City of Boise and the BLM.
Sources and method
Loam estimates conditions from weather, soil, and terrain. It does not measure the trail surface directly or override an official closure. Read how the estimate works and see the published checks and their limits.
- USDA NRCS: Hydrologic Soil Groups, soil infiltration and runoff.
- USGS: Infiltration and the Water Cycle, saturation, land cover, and slope.
These references explain physical processes, not the accuracy of Loam's predictions.
