
SGRAIL Marin - Triathlon & Trail Half Marathon is a triathlon, running, and trail running race on October 2–4, 2026 in San Rafael, CA, with entry fees from $90 to $265.
From the Organizer
REGISTER NOW — REGULAR PRICING IS ON. Price increases after September 17, 2026. Don't wait.
Last day — Triathlon, Relay & SGRAIL Challenge: Sep 25 · Last day — Trail Half Marathon: Sep 30
DISTANCES
EVENT WEEKEND SCHEDULE
WHY SGRAIL?
The question people ask us most is: what's next? Which title or record are you after? Truth be told, we're here because we love this sport and all its diversity — the nerves before a race, the new adventures, and the joy of the process of getting to those days. That's when nature becomes our playground, and "getting lost" out there is a beautiful part of the journey. That's where SGRAIL comes from: hours of exploring with friends, pushing each other — but never just for a personal best. Sitting down after a magic day, as a community, sharing stories over a coffee or a beer.
— Jan Frodeno
Everything you need to know — sgrail.country/marin
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
80°
Typical Low
52°
Chance of Rain
7%
Based on US Climate Normals data from Kentfield, 2 mi from the venue.
Host City
Population
60,604
as of 2023
City Elevation
36 ft
Nearest Airport
OAK
San Francisco Bay Oakland International Airport · 26 mi
Time Zone
Pacific Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at SGRAIL Marin - Triathlon & Trail Half Marathon, put it on the calendar, and turn “someday” into a start date.
35
Days to train
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From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think. Three sports in one race means three movements to train and race day never gets monotonous.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Running off-road — dirt, singletrack, and mountain paths — from 5Ks to ultras. The terrain makes for an exciting twist and adventure in your running journey.
Coming Up
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41 miles away
Silicon Valley Mini Kids Triathlon
50 miles away
Albany Community Triathlon 2026
13 miles away
Tri to Inspire
35 miles away
SGRAIL Marin - Triathlon & Trail Half Marathon
Oct 2, 2026