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Mt. Tamalpais (Marin)

Mountain bike trail conditions · Bay Area, CA 37.892° N  122.599° W   1,211 FT Verified

DRY: Rideable

No significant rain in the forecast.

Recent rain
0.1″ of rain, 5h ago
Today
61°Flight rain
  • Mon 10/12, no measurable rain, daily high 60 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/13, no measurable rain, daily high 71 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/14, no measurable rain, daily high 71 degrees Fahrenheit, modeled conditions: DUSTY
  • Thu 10/15, no measurable rain, daily high 83 degrees Fahrenheit, modeled conditions: DUSTY
  • Fri 10/16, no measurable rain, daily high 86 degrees Fahrenheit, modeled conditions: DUSTY
  • Sat 10/17, no measurable rain, daily high 85 degrees Fahrenheit, modeled conditions: DUSTY
  • Sun 10/18, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DUSTY
  • Mon 10/19, no measurable rain, daily high 58 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/20, no measurable rain, daily high 65 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/21, no measurable rain, daily high 65 degrees Fahrenheit, modeled conditions: DUSTY then DRY
  • Today, Thu 10/22, 0.17 inches of rain, daily high 61 degrees Fahrenheit, modeled conditions: DRY then CAUTION then DRY
  • Fri 10/23, no measurable rain, daily high 62 degrees Fahrenheit, modeled conditions: DRY
  • Sat 10/24, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: DRY
  • Sun 10/25, no measurable rain, daily high 68 degrees Fahrenheit, modeled conditions: DRY
  • Mon 10/26, no measurable rain, daily high 64 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
  • Tue 10/27, no measurable rain, daily high 63 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
Updated

Updated Thursday, October 22nd, 2026 at 20:12 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 Mt. Tamalpais (Marin) rideable today?

Yes. The live verdict is DRY, rideable now. 0.1″ of rain, 5h ago.

CHANGED
Thursday, October 22nd at 10am
Dried back to DRY.
Thursday, October 22nd at 6am
Rain moved in. Verdict dropped to CAUTION.
Wednesday, October 21st at 2pm
Rain moved in. Verdict dropped to DRY.
Over the tracked history, Mt. Tamalpais (Marin) 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 Mt. Tamalpais (Marin)

Mt. Tamalpais (Marin) is a mountain bike trail network in Bay Area, CA. Soil data at the sampled location is classified as clay. Dense tree cover can reduce sun and wind exposure, slowing drying. Terrain data indicates an elevation of about 1,211 ft, an average terrain slope of 3.7° and a predominant S-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Trails here include Coast View Trail, Tenderfoot Trail and Deer Park Fire Road. 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.

CanopyDense 78%

Dense tree cover can reduce sunlight and wind at ground level, slowing drying. Its effect depends on weather and local openings.

TerrainModerate

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

FAQ

Can you ride Mt. Tamalpais (Marin) right now?

The current estimate for Mt. Tamalpais (Marin) is DRY: rideable. Rideable now. No significant rain in the forecast. 0.1″ of rain, 5h ago.

Is Mt. Tamalpais (Marin) muddy right now?

Loam currently estimates dry conditions (DRY). Clay can retain moisture, but soil type alone does not establish drying time. 0.1″ of rain, 5h ago.

What is the soil and trail surface like at Mt. Tamalpais (Marin)?

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 Mt. Tamalpais (Marin) take to dry after rain?

Mt. Tamalpais (Marin) 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 Mt. Tamalpais (Marin) 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 Mt. Tamalpais (Marin)?

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 Mt. Tamalpais (Marin)?

Trails at Mt. Tamalpais (Marin) include Coast View Trail, Tenderfoot Trail, Camino del Canon, Deer Park Fire Road and Dipsea 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 Mt. Tamalpais (Marin)?

Terrain data indicates an elevation of about 1,211 ft, an average terrain slope of 3.7° and a predominant S-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
78%Dense
Elevation
1,211 ft
Average grade
3.7°
Predominant aspect
S-facing

Named trails

  • Coast View Trail
  • Tenderfoot Trail
  • Camino del Canon
  • Deer Park Fire Road
  • Dipsea Trail

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

Around Mt. Tamalpais (Marin)

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