Island Spring Half Marathon
Decision scores
Six 0–100 scores telling you, at a glance, who this race is for.
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About the Race
Event Date: April 26th, 2026 We kick off the Island Race Series with a fundraiser for the Alameda Hospital Foundation. 2026 is special because we have added a Half Marathon to this event Run both the Spring Half and the Island Festival Half and receive a customer "half and half" hoodie. This race will take place at Faction brewery and feature all the beautiful views, flats course and post race expo that you are used to at our September event. Event Schedule: 4/23 - 4/25/26 ~ Packet pi...
Course Profile
Course profile data unavailable for this race.
Course features
Accessibility & inclusion
Vibe & community
History & past results
Past finisher times and year-over-year participation will appear here once the organizer publishes them.
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Common questions
How hard is the Island Spring Half Marathon 5K?
We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.
What should I wear?
Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.
When does it sell out?
No published deadline. Most races raise the entry fee in tiers and can sell out without warning — sign up early if you're committed.
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