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Las Trampas

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

PRIME: Rideable now

No significant rain in the forecast.

Recent rain
No measurable rain in the past week
Today
74°Ffog or low cloud

Updated Sep 5, 2026, 14:09 UTC. Modeled hourly. Verdict last changed: Sep 3. Official closures and current trail conditions take priority.

Last 10 daysoldest to newest

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Trail outlook

Is Las Trampas rideable today?

Yes. The live verdict is PRIME, rideable now. No measurable rain in the past week.

0.1″
FORECAST
DUSTY 7d 2026-08-29: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 6d 2026-08-30: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 5d 2026-08-31: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 4d 2026-09-01: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 3d 2026-09-02: 0.00 inches of rain, representative trail outlook DUSTY
PRIME 2d 2026-09-03: 0.10 inches of rain, representative trail outlook PRIME
PRIME 1d 2026-09-04: 0.00 inches of rain, representative trail outlook PRIME
74° PRIME Today 2026-09-05: 0.00 inches of rain, Fog or low cloud, representative trail outlook PRIME
69° PRIME SUN 2026-09-06: 0.00 inches of forecast rain, Partly cloudy, representative trail outlook PRIME
83° PRIME MON 2026-09-07: 0.00 inches of forecast rain, Clear, representative trail outlook PRIME
87° PRIME TUE 2026-09-08: 0.00 inches of forecast rain, Overcast, representative trail outlook PRIME
93° PRIME WED 2026-09-09: 0.00 inches of forecast rain, Cloudy, representative trail outlook PRIME
Modeled rain Forecast rain Above soft threshold (0.5″)
Over the tracked history, Las Trampas has been rideable on 10 of the last 10 days (very dry and dusty on 7 of them). Each daily marker shows the expected daytime condition. 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. The soil is loam and drains well. The terrain averages a 5.2° slope at 833 ft and mainly faces NNE. Its rolling slopes drain steadily. Trails here include Old Moraga Ranch Trail, Clyde Wood Trail and Sumner's Trail.

How these factors affect drying

SoilLoam

Loam balances drainage with water retention, so it typically takes a day or two to dry after meaningful rain.

CanopyPartial 42%

A mix of sun and shade. Conditions vary across the network, with open sections drying faster than covered ones.

TerrainModerate

Terrain here drains at a moderate pace. It neither sheds nor holds water strongly.

FAQ

Can you ride Las Trampas right now?

The current estimate for Las Trampas is PRIME: rideable now. No significant rain in the forecast. No measurable rain in the past week.

Is Las Trampas muddy right now?

Loam currently estimates dry conditions (PRIME). No measurable rain in the past week.

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

Las Trampas sits on loam soil that drains well. Loam balances drainage with water retention, so it typically takes a day or two to dry after meaningful rain.

How long does Las Trampas take to dry after rain?

Las Trampas usually needs about a day or two to dry after meaningful rain. Its terrain drains at a moderate pace.

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.

Does Las Trampas get snow in winter?

Rarely. Las Trampas sits low and mild enough (around 833 ft) that snow seldom affects riding; conditions are driven by rain and drying. Loam still flags FROZEN on the rare freeze.

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?

Las Trampas sits at roughly 833 feet, faces mostly NNE, and averages a 5.2° grade with about 42% tree cover. It is slower to dry where it faces north, and the rolling terrain drains steadily.

When is the best time of year to ride Las Trampas?

Snow rarely affects Las Trampas. Check recent rain and allow time for the ground to dry. Its shady aspect means it needs longer after storms than sunnier networks nearby. The live verdict above reflects today.

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Network profile

Network profile

Soil
Loamdrains well
Drainage
Moderateeven drying
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