Running
Half Marathon
21.1 km
NorCal Backyard Ultra
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Trail in United States, Granite Bay
Distances
Trail
4.2-mile loop
6.8 km
Start: Oct 27, 11:00 AM
Running
5K Run
5 km
Running
5K Walk
5 km
About
An annual backyard-style ultra hosted in Granite Bay, California, featuring a never-ending 4.2-mile hourly loop format with a “Last Person Standing” challenge and a “Mini” 12-hour option.
Catering & aid stations
One aid station at the start/finish under a warm tent offering water, hydration mix, light snacks, and warm food. No aid stations on the course; course aid is not allowed.
Pacers
The event uses pacemakers indicated by Pacerflaggen on the Renntag für Laufende schedule. Target times per start wave are published on the race schedule; pacers help maintain intended lap times and keep participants on schedule.
Typical weather in Granite Bay
Monthly averages based on historical data (2000–present).
Jan56°39°
↑ 07:22
↓ 17:07
Feb59°40°
↑ 06:57
↓ 17:42
Mar63°44°
↑ 07:16
↓ 19:13
Apr69°47°
↑ 06:28
↓ 19:42
May79°54°
↑ 05:53
↓ 20:11
Jun89°60°
↑ 05:40
↓ 20:32
Jul94°64°
↑ 05:53
↓ 20:30
Aug92°63°
↑ 06:20
↓ 20:00
Sep88°60°
↑ 06:48
↓ 19:14
Oct76°53°
↑ 07:15
↓ 18:27
Nov63°44°
↑ 06:49
↓ 16:52
Dec55°40°
↑ 07:17
↓ 16:45
Last updated: Jun 5, 2026, 11:41:58 PM
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