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Annadel State Park

Mountain bike trail conditions · Bay Area, CA 38.426° N  122.631° W   771 FT Verified

DUSTY: Rideable, very dry

Expect dust and loose corners.

Recent rain
No measurable rain in the past week
Today
77°Fpartly cloudy

Updated Sep 12, 2026, 17:21 UTC. Modeled hourly. Verdict last changed: Sep 8. Official closures and current trail conditions take priority.

Last 10 daysoldest to newest

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Trail outlook

Is Annadel State Park rideable today?

Yes. The live verdict is DUSTY: rideable, but very dry and loose over hardpack. No measurable rain in the past week.

FORECAST
PRIME 7d 2026-09-05: 0.00 inches of rain, representative trail outlook PRIME
PRIME 6d 2026-09-06: 0.00 inches of rain, representative trail outlook PRIME
PRIME 5d 2026-09-07: 0.00 inches of rain, representative trail outlook PRIME
DUSTY 4d 2026-09-08: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 3d 2026-09-09: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 2d 2026-09-10: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 1d 2026-09-11: 0.00 inches of rain, representative trail outlook DUSTY
77° DUSTY Today 2026-09-12: 0.00 inches of rain, Partly cloudy, representative trail outlook DUSTY
77° DUSTY SUN 2026-09-13: 0.00 inches of forecast rain, Clear, representative trail outlook DUSTY
88° DUSTY MON 2026-09-14: 0.00 inches of forecast rain, Partly cloudy, representative trail outlook DUSTY
90° DUSTY TUE 2026-09-15: 0.00 inches of forecast rain, Clear, representative trail outlook DUSTY
89° DUSTY WED 2026-09-16: 0.00 inches of forecast rain, Partly cloudy, representative trail outlook DUSTY
No measurable rain in the window. Over the tracked history, Annadel State Park has been rideable on 10 of the last 10 days (very dry and dusty on 5 of them). Each daily marker shows the expected daytime condition. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Annadel State Park

Annadel State Park is a mountain bike trail network in Bay Area, CA. The soil is gravelly clay and drains fast. The terrain averages a 7.2° slope at 771 ft and mainly faces NNW. Its rolling slopes drain steadily.

How we check ourselves

How these factors affect drying

SoilGravelly clay

About 27% of this ground is rock fragments, so water runs through it faster than the soil type alone suggests. It dries quicker than plain clay.

CanopyPartial 54%

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

TerrainSheds water

Water runs off this terrain rather than pooling, which helps the surface dry out after rain.

FAQ

Can you ride Annadel State Park right now?

The current estimate for Annadel State Park is DUSTY: rideable, very dry. Rideable, but very dry. Expect dust and loose corners. No measurable rain in the past week.

Is Annadel State Park muddy right now?

Loam currently estimates dry conditions (DUSTY). Clay soil can stay wet for several days. No measurable rain in the past week.

What is the soil and trail surface like at Annadel State Park?

Annadel State Park sits on gravelly clay soil that drains fast. About 27% of this ground is rock fragments, so water runs through it faster than the soil type alone suggests. It dries quicker than plain clay.

How long does Annadel State Park take to dry after rain?

Annadel State Park can need several days to dry after meaningful rain. Its terrain sheds water, which speeds drying.

Can you ride Annadel State 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.

Does Annadel State Park get snow in winter?

Rarely. Annadel State Park sits low and mild enough (around 771 ft) that snow seldom affects riding; conditions are driven by rain and drying. Loam still flags FROZEN on the rare freeze.

What's the terrain and elevation like at Annadel State Park?

Annadel State Park sits at roughly 771 feet, faces mostly NNW, and averages a 7.2° grade with about 54% 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 Annadel State Park?

Snow rarely affects Annadel State Park. 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
Gravelly claydrains fast
Drainage
Sheds waterdries quickly
Tree cover
54%Partial
Elevation
771 ft
Average grade
7.2°
Predominant aspect
NNW-facing

Around Annadel State Park

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