American River 50 Mile Endurance Run

The American River 50 Mile Endurance Run, or AR50, is a 50 mile (80.47 kilometer) ultramarathon beginning in Sacramento, California and ending in Auburn, California. The event is held annually in April.

For the first 24 miles (39 km), the course follows a bike path that runs along the American River, then switches to trails for the remainder of the race.

Read more about American River 50 Mile Endurance Run:  Awards, History, Records

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