Pulse Endurance Runs

Pulse Endurance Runs - March 19-21, 2026

Pulse Endurance Runs is a timed running event held at Eagle Island State Park in Eagle, Idaho (4000 W. Hatchery Rd.). The course is a flat, dirt loop of about 2.5 miles that borders the Boise River and Eagle Island pond. The event includes fixed-time formats and a fixed-distance option. Official aid is available at the lap finish, roughly every 2.5 miles. The park entry fee is $7 per car unless the vehicle has an Idaho State Parks Passport. Packet pickup is offered the day before the event at Shu's Running Company and at the park shelter; runners must pick up their timing chip before their race.

Event details

• 48-hour timed event
• 24-hour timed event
• 12-hour timed event
• 6-hour timed event
• 100-mile fixed-distance option
• 100-mile relay for up to 5 runners

Relay teams exchange the timing chip only inside the designated transition area at the start/finish. Relay runners who leave the park may not return to run again. No pacers are allowed in the relay. For non-relay races, pacers are permitted once a runner reaches the halfway point of their event. Crews and personal aid are allowed only in the designated start/finish area. Local entrants are required to provide one volunteer for a minimum four-hour shift; this requirement is waived for out-of-state entrants. No refunds will be provided, including in the event of a cancellation outside the organizer's control. Overall top three winners are awarded for each race. Visit the organization's website for the most recent information.