About This Race

A backyard ultra taking place at Dry Creek Parkway, Rio Linda, California where runners complete 4.16 mile loops every hour until only one remains.

Key Dates

Registration Closes

Invalid Date

NaNd

Race Day

Mar 27, 2027

202d

Registration opens, price changes, race updates: straight to your inbox.

Current Price

$136

Backyard Ultra - Early

Price Progression

12hr Mini BU - After Nov 01

$99.95Nov 1, 2026

Backyard Ultra - After Nov 01

$145Nov 1, 2026

12hr Mini BU - Early

$90

Backyard Ultra - Early

$136

Race Planning

Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.

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