SGRAIL Marin - Triathlon & Trail Half Marathon
SGRAIL Marin - Triathlon & Trail Half Marathon is a triathlon, running, and trail running race on October 2–4, 2026 in San Rafael, CA, featuring the Half Marathon and Olympic distances, with entry fees from $90 to $265.
- Date
- October 2–4, 2026 (92 days to go)
- Distance
- Half Marathon · Olympic
- Price
- $90–$265
- Sports
- TriathlonRunningTrail Running
From the Organizer
Welcome to the SGRAIL Marin - Triathlon and Trail Half Marathon!
Registration
- June 26, 2026 (12:00 PM PST) - Pre-Registration Starts
- July 12, 2026 - Early Bird Registration Starts
- August 4, 2026 - Regular Registration Starts
- September 18, 2026 - Late Registration Starts
September 25, 2026 - Last Day for Triathlon, Triathlon Relay & SGRAIL Challenge Registration
September 30, 2026 - Last Day for Trail Half Marathon Registration
DISTANCES: (ALL COURSES)
- TRIATHLON - Kids Event (13 & Under) = Details TBA
- TRIATHLON - Olympic Distance = 1,500 Meter Swim / 40K Bike / 10K Run
- TRIATHLON - Olympic Relay (2 or 3 person relays) = 1,500 Meter Swim / 40K Bike / 10K Run
- TRAIL HALF MARATHON = 13.1 Miles/21K
- SGRAIL CHALLENGE= Triathlon + Trail Half Marathon
EVENT WEEKEND SCHEDULE:
- THURSDAY - TBA
- Bib Pick-up
- FRIDAY - TBA
- Bib Pick-up
- Kids Fun Event
- SATURDAY - 7:00 AM Gates Open | 8:30 AM Roads Close | 9:00 AM Start Time | 1:00 PM Roads Open
- Olympic Triathlon
- Olympic Triathlon Relay
- SUNDAY - 7:00 AM Gates Open | 8:30 AM Start Time | 12:30 PM Event Ends
- Trail Half Marathon
Events
Weather
Typical Conditions
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
79°
Typical Low
53°
Chance of Rain
7%
Based on US Climate Normals data from San Rafael Civic Ctr, 1 mi from the venue.
Host City
About San Rafael, CA
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
Approximate location — pin shows the host city, not the exact venue.
Your Next Start Line
What Are You
Waiting For?
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.
92
Days to train
- Race
- SGRAIL Marin - Triathlon & Trail Half Marathon
- Date
- October 2–4, 2026
Coming Up
More Triathlon races near San Rafael, CA
Tri Santa Cruz
Sprint · Olympic · 500m · 1500m · From $90 · 119 Center Street
77 miles away
Sandman Tri
Sprint · Olympic · From $90 · State Park Dr, Seacliff, CA 95003
79 miles away
Barbara Schmidt Millar Women's Triathlon & 5K: Celebrating Life, Empowering Women
5K · Sprint · From $40 · 14800 Lake Ln, Nevada City, CA 95959
124 miles away
Silicon Valley Mini Kids Triathlon
Sprint · From $60 · MacDonald High School
53 miles away
From Endurance Grid
About These Sports
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.
Triathlon
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.
Running
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.
Trail Running
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.
Frequently Asked Questions (FAQs)
What is the SGRAIL Marin - Triathlon & Trail Half Marathon?+
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SGRAIL Marin - Triathlon & Trail Half Marathon
Oct 2, 2026