Observed arrival · 2026-09-17

Acaloops, the Six-Lap Hill Ultra

acaloops.run Observed source

Editorial interest 78/100 Selection signal · not a rating of the site

A Walnut Creek ultramarathon built around repeating an approximately 8.5-mile loop through Acalanes Ridge Open Space.

Landing page captured for the 2026-09-17 issue.

Field notes

The course is organized as an approximately 8.5-mile loop with about 2,400 feet of climbing, repeated up to six times for the stated 50-mile distance. The page links to a Strava route and GPX file, identifies 2446 Mallard Dr as the start and finish, and specifies water, ice, and electrolytes at that location while runners supply their own fuel. It lists Fall 2026 and Spring 2027 editions.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

◉HumanPersonal, local, civic, or handmade

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