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Calero County Park

Mountain bike trail conditions · Bay Area, CA 37.193° N  121.808° W   417 FT Verified

DUSTY: Rideable, very dry

Expect dust and loose corners.

Recent rain
0.2″ of rain, 1d ago
Today
73°Fcloudy
  • Mon 10/26, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DRY then DUSTY
  • Tue 10/27, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/28, no measurable rain, daily high 68 degrees Fahrenheit, modeled conditions: DUSTY
  • Thu 10/29, no measurable rain, daily high 71 degrees Fahrenheit, modeled conditions: DUSTY
  • Fri 10/30, no measurable rain, daily high 70 degrees Fahrenheit, modeled conditions: DUSTY
  • Sat 10/31, no measurable rain, daily high 66 degrees Fahrenheit, modeled conditions: DUSTY
  • Sun 11/1, 0.10 inches of rain, daily high 63 degrees Fahrenheit, modeled conditions: DUSTY then CAUTION then DUSTY
  • Mon 11/2, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 11/3, 0.16 inches of rain, daily high 65 degrees Fahrenheit, modeled conditions: DUSTY then STAY OFF then CAUTION
  • Wed 11/4, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: CAUTION then DUSTY
  • Today, Thu 11/5, no measurable rain, daily high 73 degrees Fahrenheit, modeled conditions: DUSTY
  • Fri 11/6, no measurable rain, daily high 75 degrees Fahrenheit, modeled conditions: DUSTY
  • Sat 11/7, no measurable rain, daily high 82 degrees Fahrenheit, modeled conditions: DUSTY
  • Sun 11/8, no measurable rain, daily high 79 degrees Fahrenheit, modeled conditions: DUSTY
  • Mon 11/9, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DUSTY, forecast preview, beyond the free window
  • Tue 11/10, no measurable rain, daily high 82 degrees Fahrenheit, modeled conditions: DUSTY, forecast preview, beyond the free window
Updated

Updated Thursday, November 5th, 2026 at 12:46 UTC. Verdict last changed: Monday, November 2nd. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

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Is Calero County Park rideable today?

Yes. The live verdict is DUSTY: rideable, but very dry and loose over hardpack. 0.2″ of rain, 1d ago.

CHANGED
Wednesday, November 4th at 5am
Dried back to DUSTY.
Tuesday, November 3rd at 11pm
Dried back to CAUTION.
Tuesday, November 3rd at 7pm
Rain moved in. Verdict dropped to STAY OFF.
Over the tracked history, Calero County Park has been rideable on 9 of the last 10 days (very dry and dusty on 9 of them), and under a caution advisory on 1. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Calero County Park

Calero County Park is a mountain bike trail network in Bay Area, CA. Soil data at the sampled location is classified as clay. Open tree cover can allow more sun and wind exposure, helping drying. Terrain data indicates an elevation of about 417 ft, an average terrain slope of 3.8° and a predominant NNE-facing aspect. Terrain slope does not measure the trail tread or its drainage features. 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

SoilClay

Clay can retain moisture and become slick when wet. Wait for a firm trail surface and respect posted closures. The model uses surveyed water-retention values, not measured trail recovery times.

CanopyOpen 6%

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 Calero County Park right now?

The current estimate for Calero County Park is DUSTY: rideable, very dry. Rideable, but very dry. Expect dust and loose corners. 0.2″ of rain, 1d ago.

Is Calero County Park muddy right now?

Loam currently estimates dry conditions (DUSTY). Clay can retain moisture, but soil type alone does not establish drying time. 0.2″ of rain, 1d ago.

What is the soil and trail surface like at Calero County Park?

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

How long does Calero County Park take to dry after rain?

Calero County 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 Calero County Park after rain?

Clay soil needs time to dry. Riding it wet can leave lasting ruts. 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 Calero County 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's the terrain and elevation like at Calero County Park?

Terrain data indicates an elevation of about 417 ft, an average terrain slope of 3.8° 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
Claydrainage input
Terrain
Moderateterrain slope
Tree cover
6%Open
Elevation
417 ft
Average grade
3.8°
Predominant aspect
NNE-facing

Around Calero County Park

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