The 2026 Angel Island Half Marathon & 10K returns to Tiburon, California on August 29th. This hilly loop trail circumnavigating the island offers runners breathtaking vistas of San Francisco and its surroundings.
Race morning finds participants starting at the Tiburon Ferry Terminal, with a warm but steady breeze blowing off the bay. Temperatures hover around an average of 19°C, feeling slightly warmer due to high UV levels and low humidity. The course is firm yet soft underfoot, presenting a challenging terrain that rewards both seasoned runners and newcomers. The event has been running for several years now, with a limit of only 400 participants this year to ensure an intimate experience. Over the past few events, hundreds have joined in support of local charities, making each run more meaningful than the last. The race offers a 10K and half marathon distance options. The 10K is one loop around Angel Island, while the half marathon covers two loops for a total of 21 kilometers. For those aged between six and seventeen, there are youth versions available at reduced fees. Race registration can be completed via https://raceroster.com/events/2026/116189/2026-angel-island-half-marathon-and-10k with a fee of $87.58 for adults and half that amount for youth participants. Registration closes on August 23rd, so don't wait too long. Bibs are available for pickup at the Tiburon Library on August 28th from 4:00 PM to 6:00 PM or the day of the race starting at 5:30 AM. Bring a photo ID and any medical documentation if needed. The start location is at the Tiburon Ferry Terminal, where runners will be greeted by signs directing them through the parking lot towards the registration area. The half marathon age requirement is 16 years or older; first-timers are encouraged to familiarize themselves with the course layout beforehand. This race is a must for anyone who wants to experience the stunning natural beauty of Angel Island while supporting local causes.
Races Offered
10K
Aug 29, 2026
straighten
Distance —
10km
terrain
Type —
Running
timer
08:00
sell
$87.58
10K - Youth (6-17)
Aug 29, 2026
straighten
Distance —
10km
terrain
Type —
Running
timer
08:00
sell
$44.79
Half Marathon
Aug 29, 2026
straighten
Distance —
21km
terrain
Type —
Running
timer
08:00
sell
$87.58
Half Marathon - Youth (6-17)
Aug 29, 2026
straighten
Distance —
21km
terrain
Type —
Running
timer
08:00
sell
$44.79
Weather History
These values represent the 3-year monthly averages for August in Tiburon.
thermostatTemperature
13.7° / 25.1°
wb_sunnyFeels like
12.9° / 23.6°
light_mode
Avg sunshine hours
12h 0m
water_drop
Avg rainfall
—
ac_unit
Avg snowfall
—
air
Avg wind speed
9.7 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
High (7.0)
humidity_mid
Humidity
73.4%
wb_twilight
Sunrise
06:26
nightlight
Sunset
20:00
About Tiburon
Learn more about the host city, Tiburon.
Tiburon is a small historic town in California's Marin County, located across the bay from San Francisco. Tiburon's Main Street has been preserved as it was when the town was a Gold Rush train town and lumber yard. The scenic "Ark Row" shops are actually housed in turn of the century boat houses that were converted into homes and shops when the lagoon between the Tiburon peninsula and the neighboring island of Belvedere was filled in.
