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Del Valle Regional Park

Mountain bike trail conditions · Bay Area, CA 37.594° N  121.715° W   961 FT Verified

DRY: Rideable

Thursday, October 22nd at 1pm Conditions turn Caution.

Recent rain
No measurable rain in the past week
Today
59°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 82 degrees Fahrenheit, modeled conditions: DUSTY
  • Fri 10/16, no measurable rain, daily high 88 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 78 degrees Fahrenheit, modeled conditions: DUSTY
  • Mon 10/19, no measurable rain, daily high 66 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/20, no measurable rain, daily high 67 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, 0.22 inches of rain, daily high 59 degrees Fahrenheit, modeled conditions: DRY then CAUTION
  • Fri 10/23, no measurable rain, daily high 61 degrees Fahrenheit, modeled conditions: CAUTION then DRY
  • Sat 10/24, no measurable rain, daily high 73 degrees Fahrenheit, modeled conditions: DRY
  • Sun 10/25, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY
  • Mon 10/26, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
  • Tue 10/27, no measurable rain, daily high 71 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
Updated

Updated Thursday, October 22nd, 2026 at 20:24 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 Del Valle Regional Park rideable today?

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

CHANGED
Wednesday, October 21st at 3pm
Rain moved in. Verdict dropped to DRY.
Over the tracked history, Del Valle Regional Park has been rideable on 10 of the last 10 days (very dry and dusty on 9 of them). Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Del Valle Regional Park

Del Valle Regional Park is a mountain bike trail network in Bay Area, CA. Soil data at the sampled location is classified as loam. Open tree cover can allow more sun and wind exposure, helping drying. Terrain data indicates an elevation of about 961 ft, an average terrain slope of 4.5° and a predominant W-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Trails here include East Shore Trail, Ridgeline Trail and Deer Jaw 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 we check ourselves

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.

CanopyOpen 17%

Open tree cover can allow more sunlight and wind to reach the ground. Terrain, weather and trail construction also affect drying.

TerrainModerate

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

FAQ

Can you ride Del Valle Regional Park right now?

The current estimate for Del Valle Regional Park is DRY: rideable. Rideable now. No significant rain in the forecast. No measurable rain in the past week.

Is Del Valle Regional Park muddy right now?

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

What is the soil and trail surface like at Del Valle Regional Park?

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 Del Valle Regional Park take to dry after rain?

Del Valle Regional Park 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 Del Valle Regional Park 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 Del Valle Regional Park?

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 Del Valle Regional Park?

Trails at Del Valle Regional Park include East Shore Trail, Ridgeline Trail, Deer Jaw Trail, East Ridge Trail and Hetch Hetchy 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 Del Valle Regional Park?

Terrain data indicates an elevation of about 961 ft, an average terrain slope of 4.5° and a predominant W-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
17%Open
Elevation
961 ft
Average grade
4.5°
Predominant aspect
W-facing

Named trails

  • East Shore Trail
  • Ridgeline Trail
  • Deer Jaw Trail
  • East Ridge Trail
  • Hetch Hetchy Trail

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

Around Del Valle Regional Park

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