Running
Marathon
50 km
American Birkebeiner
Loading map…
Trail in United States, Hayward
Distances
Running
Half Marathon
29 km
Running
10K
10 km
About
North America’s premier cross-country ski marathon, offering multiple race distances on the iconic Birkie trail with year-round events and community.
Catering & aid stations
On-course aid stations with beverages and snacks (not Pacemaker lines).
Pacers
Pacers set target times per Start Wave shown on the 'Renntag für Laufende' page and indicated by Pacerflaggen; contact pace leads for segment time goals.
Results
View official resultsTypical weather in Hayward
Monthly averages based on historical data (2000–present).
Jan57°42°
↑ 07:23
↓ 17:13
Feb59°44°
↑ 06:59
↓ 17:47
Mar62°46°
↑ 07:19
↓ 19:16
Apr65°48°
↑ 06:33
↓ 19:44
May69°52°
↑ 05:59
↓ 20:12
Jun74°55°
↑ 05:47
↓ 20:32
Jul76°57°
↑ 06:00
↓ 20:30
Aug77°58°
↑ 06:25
↓ 20:02
Sep78°58°
↑ 06:52
↓ 19:17
Oct72°54°
↑ 07:18
↓ 18:32
Nov63°47°
↑ 06:50
↓ 16:58
Dec57°43°
↑ 07:17
↓ 16:52
Route maps
Last updated: Jun 6, 2026, 12:03:44 AM
Get RaceAlerts
We'll email you when races match your filters. No spam — only what fits your goals.
Related runs
On your marks
Loading race details…