Stinson Beach, CA, United States · Saturday, November 7, 2026

Fixed Distance 50K

Mt. Tam Trail Run

52 days away

50 km Distance

not publishedn/a Climbing

2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

37.8972° N, 122.6398° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 8 hours 9:36 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 89% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →

Field size ~121 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2024 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, November

Daytime high 17°C

Night low 8°C

Rainfall Mostly dry

Daylight 10 h 25 m of light

Regional 2001-2020 average for November — NASA POWER, grid elevation 87 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 50 km of trail.

Trail Running Shoes50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition50 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 50 km, without the bounce.
GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

★★★★★ 4.5

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Course Notes

Mt. Tamalpais is the dominating feature in Marin County. Race starts at Stinson Beach and climbs to perched views from Tam before returning via some of the best trails the Headlands.

Similar races

Other 50K trail ultras, closest in distance first.