Marin & Mount Tamalpais Mountain Bike Trail Conditions
Marin County, just north of San Francisco, is the birthplace of mountain biking. Mount Tamalpais, China Camp, and Camp Tamarancho offer everything from fire-road classics to flowy singletrack, on soils that range from quick-draining to slick clay when wet. The Mediterranean climate keeps the dry season long and the winters green and muddy.
103 featured mountain bike trailselevation 3–2,031 ft
Is it muddy in Marin & Mount Tamalpais right now?
Right now about 100 of 100 featured Marin & Mount Tamalpais trails are riding well. Conditions change daily with rain and snowmelt, so the list below shows the live read for each trail, and the chart shows which day ahead is your best bet.
Typical riding conditions by month, blending heat and trail conditions from 10 years of local climate data — so you can plan a trip for the right window.
The best time to ride Marin & Mount Tamalpais is April through November, when daytime highs sit in the 61–73°F range and the dirt is typically dry. January through March and December tends to be the wettest, muddiest stretch. Planning a trip? Those are your safest bets — and for this week, the live forecast below shows exactly which days are riding well (right now 100 of 100 featured trails are good to go).
PrimeMud season
Bar height = our ride-friendliness score for a typical year; colour = the main limiting factor; the number under each month is the average daytime high. Based on 2014–2023 climate normals (ERA5); this year's live conditions are below.
Trail networks in Marin & Mount Tamalpais
Named riding areas in Marin & Mount Tamalpais, each with its own live conditions and the trails inside it.
What are the best mountain bike trails to ride near Marin & Mount Tamalpais right now?
Today the trails riding best near Marin & Mount Tamalpais are 7-Eleven, Alchemist Trail and B-17 Extension. The full list below is sorted by today's real conditions, best first, and refreshes every morning, so the top of the list is always your best bet right now. See live conditions →
When will the mountain bike trails in Marin & Mount Tamalpais dry out?
It depends on recent rain and each trail's soil. The 10-day outlook on this page shows how many Marin & Mount Tamalpais trails are expected to be riding well each day, with rain markers, so you can pick the right day instead of guessing. See the 10-day outlook →
Is it too muddy to ride in Marin & Mount Tamalpais after rain?
Right now 0 of 100 featured Marin & Mount Tamalpais trails are reading soft or too muddy to ride. Marin & Mount Tamalpais is mostly loam soil, which drains at a moderate pace, so after a storm some trails firm up within a day while others stay greasy. Riding wet, soft dirt damages trails and leaves ruts, so check the live mud reading on each trail before you head out. Check the live mud reading →
How many mountain bike trails are in Marin & Mount Tamalpais?
Marin & Mount Tamalpais has 103 featured mountain bike trails tracked here for conditions, with more searchable on the live map.
How high are the Marin & Mount Tamalpais trails?
Marin & Mount Tamalpais trails run from about 3–2,031 ft. Higher trails hold snow later into spring and dry out later than the lower ones, so conditions can vary a lot across the same area on the same day.
When is the best time to ride mountain bikes in Marin & Mount Tamalpais?
The best time to ride Marin & Mount Tamalpais is April through November, when daytime highs are in the 61–73°F range and the trails are typically dry. January through March and December tends to be the wettest, muddiest stretch. This is based on 10 years of local climate data; check the live conditions on this page for how the trails are actually riding today.