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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Ultramarathon
  • 50 km
  • Muir Beach
  • Event weekend starts
  • Past event

Tamalpa Headlands 50K Ultramarathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Modelled energy-cost change 11.6% versus flat · net elevation -1 m

View verified GPS mapOfficial event website ↗
Data current as of

Decision summary

Tamalpa Headlands 50K Ultramarathon at a glance

Route ascent
1,966 m

Lower than 56% of comparable mapped races

Cut-off average pace
12:00/km

10:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
76/100

Historical race-date favourability, not a forecast

Evidence depth
52 verified facts

Stored GPS route

Quick answers

What runners ask first

Tamalpa Headlands 50K Ultramarathon route map

raceindex.org has a GPS course file for Tamalpa Headlands 50K Ultramarathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Tamalpa Headlands 50K Ultramarathon?

The Tamalpa Headlands 50K Ultramarathon route has 1,966 m of ascent, 1,967 m of descent and an estimated 11.6% grade-adjusted pace penalty versus a flat route.

Where does the Tamalpa Headlands 50K Ultramarathon route go?

The Tamalpa Headlands 50K Ultramarathon route starts at Santos Meadow, Muir Beach, California (beside the Muir Beach Volunteer Fire Department event facility) and finishes at Santos Meadow, Muir Beach, California. Underfoot, expect mixed terrain: single-track trail, fire roads, and brief sections along Highway 1. It passes Rodeo Beach, Pirate Cove, Tennessee Valley, Wolf Ridge and Miwok Trail. finish-line after-party at Santos Meadow.

What should runners know on race day for the Tamalpa Headlands 50K Ultramarathon?

8.

Race character

Scenery

  • Coastal
  • Countryside
  • Mountain
  • Forest
  • Waterfront
  • Parkland

Atmosphere

  • Wilderness
  • Scenic Tour
  • Competitive

Terrain

  • Beach
  • Trail
Elevation character
Mountainous
Technicality
Technical

Entry, logistics and records

Records and field

Men's course record
3:37:20 (Andy Wacker)
Women's course record
4:20:51 (Megan Roche)
Field size
250
Field cap
250

Entry requirements

Entry status
Past event: The listed edition date has passed.
Cut-off
10-hour overall finishing cutoff (5:30 PM); intermediate aid-station cutoffs along the course
Qualification status
No qualifying time required; open first Come, first Served registration capped at 250 runners

Race day logistics

Aid stations
8
Expo / packet pickup
No expo; packet pickup Friday 3pm-6pm at San Francisco Running Company, or race morning 6:00-6:45am at the Santos Meadow start area
Medal
All registered runners receive a specially designed Headlands 50K T-shirt and a goody bag
Finisher tee
Specially designed Headlands 50K T-shirt for all registered runners

Access and course status

Start
Santos Meadow, Muir Beach, California (beside the Muir Beach Volunteer Fire Department event facility)
Finish
Santos Meadow, Muir Beach, California

Course facts

Course type
Loop
Surface
Mixed terrain: single Track trail, fire roads, and brief sections along Highway 1
Landmarks
Rodeo Beach, Pirate Cove, Tennessee Valley, Wolf Ridge, Miwok Trail, Dipsea Trail, Matt Davis Trail, Steep Ravine, Stinson Beach, Cardiac Hill, Pantoll Ranger Station, Coastal Trail
Notable features
  • USATF Pacific Association Grand Prix event with a $10,000 prize purse
  • finish-line after-party at Santos Meadow
  • Eight aid stations across 31.3 miles
  • cup-free race (runners bring own drinking vessel)
  • crew access permitted at Rodeo Beach, Tennessee Valley and Stinson aid stations
  • 7:30 AM start

How hilly is the Tamalpa Headlands 50K Ultramarathon?

31%15%17%9%28%
  • Steep descent 31%
  • Descent 15%
  • Flat 17%
  • Climb 9%
  • Steep climb 28%
Total ascent
1,966 m
Net elevation
−1 m
GAP factor
11.6%
Longest climb
3,280 m at 9.5%
Gradient mix and ascent are derived from the course geometry under our published normalisation, not taken from organiser marketing.

What are typical race-day conditions?

  • 17°CTypical temperature
  • 18 kphTypical wind
  • 0 mmTypical rainfall
  • 76Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

More race details

Is the Tamalpa Headlands 50K Ultramarathon flat?

Its normalised GAP factor is 11.6% slower than a flat course, with about 1966 m of total ascent.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (3)

Read the full methodology →