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Castro Valley · destination, not courseCastro Valley destination photo, not a view of this race course. Castro Valley Library entrance (2026-09-15 19:01:01). Photo by BriefEdits · CC BY-SA 4.0 · Original image. Resized, display-cropped and gently color-graded.
Mixed surfaces running; the exact distance still needs confirmation.
Not verified
Climbing details unavailable
Not verified
Time limit not currently verified
Unknown does not mean no cutoff.
Personal fit
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Recorded
Mixed surfaces · out-and-back
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A New Year’s Day trail half marathon at Lake Chabot. It is part of the Ultra Half Series.
About half paved and half dirt.
Exact-distance organizer download linked on current event page. GPX link provenance verified; raw route geometry not inspected.
Pacific time
Currently linked by the explicitly dated 2027 event home. Web extraction of directions is cached seven months ago, while search extraction reports last month. Direct current fetch returned 403; precise live page freshness is not established.
Currently linked by the explicitly dated 2027 event home. Web extraction of directions is cached seven months ago, while search extraction reports last month. Direct current fetch returned 403; precise live page freshness is not established.
This map shows the race’s listed city, not a verified start or finish. Exact start and finish locations are not confirmed.
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Price not yet confirmed
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Official organizer information
Recorded source snapshot, prepared Oct 14, 2026. Availability, fees and logistics may change. Live details will refresh when available; the recorded details may change. This snapshot date is a data retrieval date, not a new organizer verification.
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