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Las Trampas

Mountain bike trail conditions · Bay Area, CA 37.834° N  122.096° W   833 FT Verified

CAUTION: Use judgment

Thursday, October 22nd at 5pm Dries back to Dry.

Recent rain
0.1″ of rain, in the last hour
Today
58°Flight rain
  • Mon 10/12, no measurable rain, daily high 68 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/13, no measurable rain, daily high 73 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/14, no measurable rain, daily high 79 degrees Fahrenheit, modeled conditions: DUSTY
  • Thu 10/15, no measurable rain, daily high 84 degrees Fahrenheit, modeled conditions: DUSTY
  • Fri 10/16, no measurable rain, daily high 89 degrees Fahrenheit, modeled conditions: DUSTY
  • Sat 10/17, no measurable rain, daily high 89 degrees Fahrenheit, modeled conditions: DUSTY
  • Sun 10/18, no measurable rain, daily high 74 degrees Fahrenheit, modeled conditions: DUSTY
  • Mon 10/19, no measurable rain, daily high 62 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/20, no measurable rain, daily high 69 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/21, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DUSTY then DRY
  • Today, Thu 10/22, 0.19 inches of rain, daily high 58 degrees Fahrenheit, modeled conditions: DRY then CAUTION then DRY then CAUTION then DRY
  • Fri 10/23, no measurable rain, daily high 62 degrees Fahrenheit, modeled conditions: DRY
  • Sat 10/24, no measurable rain, daily high 74 degrees Fahrenheit, modeled conditions: DRY
  • Sun 10/25, no measurable rain, daily high 75 degrees Fahrenheit, modeled conditions: DRY
  • Mon 10/26, no measurable rain, daily high 73 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
  • Tue 10/27, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
Updated

Updated Thursday, October 22nd, 2026 at 20:32 UTC. Verdict last changed: Thursday, October 22nd. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

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Is Las Trampas rideable today?

Rideable with judgment. The live verdict is CAUTION: the model reads the surface as marginal. 0.1″ of rain, in the last hour.

CHANGED
Thursday, October 22nd at 9am
Dried back to DRY.
Thursday, October 22nd at 6am
Rain moved in. Verdict dropped to CAUTION.
Wednesday, October 21st at 2am
Rain moved in. Verdict dropped to DRY.
Over the tracked history, Las Trampas has been rideable on 9 of the last 10 days (very dry and dusty on 8 of them), and under a caution advisory on 1. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Las Trampas

Las Trampas is a mountain bike trail network in Bay Area, CA. Soil data at the sampled location is classified as loam. Terrain data indicates an elevation of about 833 ft, an average terrain slope of 5.2° and a predominant NNE-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Trails here include Old Moraga Ranch Trail, Clyde Wood Trail and Sumner's Trail. Loam models conditions across the network; individual trails and constructed surfaces can differ from these environmental inputs. Official closures and conditions on the ground take priority.

How these factors affect drying

SoilLoam

Loam combines drainage with water retention. Soil type alone does not establish how long this network takes to dry. The model uses surveyed water-retention values, not measured trail recovery times.

CanopyPartial 42%

Partial tree cover suggests a mix of sun and shade. Local exposure and surface conditions can vary across the network.

TerrainModerate

Moderate terrain slope is one input to the drying model. Local drainage also depends on soil and trail construction.

FAQ

Can you ride Las Trampas right now?

The current estimate for Las Trampas is CAUTION: use judgment. Expected rideable in ~4 hours. No significant rain before then. 0.1″ of rain, in the last hour.

Is Las Trampas muddy right now?

Possibly in places. The current estimate is CAUTION. Watch for soft sections, especially in low or shaded areas. 0.1″ of rain, in the last hour.

What is the soil and trail surface like at Las Trampas?

The soil data at the sampled location is classified as loam. This describes an environmental input, not a survey of every trail surface.

How long does Las Trampas take to dry after rain?

Las Trampas has no fixed drying time. Rainfall, soil moisture, shade and the weather that follows all matter. Check the current estimate and wait until the trail surface is firm.

Can you ride Las Trampas after rain?

Drying time depends on how much rain fell and the weather that follows. Wait until the surface is firm. Check the current estimate before heading out, and turn back if your tires leave ruts.

What does a frozen condition mean at Las Trampas?

FROZEN means Loam estimates snow cover or frozen ground. It does not establish that riding is allowed or that every trail is frozen. Check posted winter access rules and watch for soft ground as temperatures rise.

What trails are at Las Trampas?

Trails at Las Trampas include Old Moraga Ranch Trail, Clyde Wood Trail, Sumner's Trail, Golden Trail and Frick Trail. This is a partial list. The condition estimate covers the whole network, so individual trails may differ.

What's the terrain and elevation like at Las Trampas?

Terrain data indicates an elevation of about 833 ft, an average terrain slope of 5.2° and a predominant NNE-facing aspect. Terrain slope does not measure the trail tread or its drainage features.

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Network profile

Network profile

Soil
Loamdrainage input
Terrain
Moderateterrain slope
Tree cover
42%Partial
Elevation
833 ft
Average grade
5.2°
Predominant aspect
NNE-facing

Named trails

  • Old Moraga Ranch Trail
  • Clyde Wood Trail
  • Sumner's Trail
  • Golden Trail
  • Frick Trail

This is a partial trail list. The condition estimate covers the whole network. Trail names from public agency data and © OpenStreetMap contributors.

Around Las Trampas