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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
87°Ffog or low cloud
Last 10 daysoldest to newest

Updated Aug 26, 2026, 20:29 UTC. Modeled hourly. Official closures and current trail conditions take priority.

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.

Trail outlook

FORECAST
DUSTY 7d 2026-08-19: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 6d 2026-08-20: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 5d 2026-08-21: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 4d 2026-08-22: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 3d 2026-08-23: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 2d 2026-08-24: 0.00 inches of rain, representative trail outlook DUSTY
DUSTY 1d 2026-08-25: 0.00 inches of rain, representative trail outlook DUSTY
87° DUSTY Today 2026-08-26: 0.00 inches of rain, Fog or low cloud, representative trail outlook DUSTY
88° DUSTY THU 2026-08-27: 0.00 inches of forecast rain, Cloudy, representative trail outlook DUSTY
90° DUSTY FRI 2026-08-28: 0.00 inches of forecast rain, Cloudy, representative trail outlook DUSTY
84° DUSTY SAT 2026-08-29: 0.00 inches of forecast rain, Clear, representative trail outlook DUSTY
87° DUSTY SUN 2026-08-30: 0.00 inches of forecast rain, Clear, 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 10 of them). Daily trail markers are representative daytime outlooks. Weather is one input. The rideability verdict also accounts for soil, terrain, canopy, and drying time.

Why Annadel State Park dries this way

Annadel State Park sits in the Bay Area, CA area, on gravelly clay soil that drains fast over terrain that sheds water and dries quickly. Whether it’s worth riding comes down to how that ground sheds and holds water after rain. That’s exactly what Loam tracks, hour by hour. The terrain here is rolling (a 7.2° average grade at 771 ft) and drains steadily rather than pooling, while the NNW-facing aspect keeps the dirt shaded for much of the day, so moisture lingers after rain and snow is slow to clear.

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
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.

Around Annadel State Park

FAQ

Can you ride Annadel State Park right now?

As of the latest update, Annadel State Park is Rideable, very dry (DUSTY). Rideable, but very dry. Expect dust and loose corners. No measurable rain in the past week.

Is Annadel State Park muddy right now?

No. The current verdict is DUSTY, which means the model reads the surface as dry. Its clay soil holds mud longer than most once it is wet. 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?

Usually yes, but give it real time: clay holds water, and riding it wet cuts ruts that last all season. Rather than counting days, check the live verdict above: it already accounts for how much rain actually fell here and how fast this exact ground, with its slope and tree cover, gives back a firm, dry surface.

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. That makes it a shady network that holds moisture longer than sunnier neighbors, and the rolling grade means it drains at a steady clip. Loam models this exact ground against live weather rather than using one regional forecast.

When is the best time of year to ride Annadel State Park?

There is no real off-season at Annadel State Park: snow rarely interferes, so good days come down to rain and how fast the dirt dries. Its shady aspect means it needs longer after storms than sunnier networks nearby. The live verdict above reflects today.

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