Prepare to test your limits at the Pulse Endurance Runs on March 21, 2026, nestled within the picturesque Eagle Island State Park in Eagle, ID. Offering timed challenges of 12-hour and 6-hour durations, this event is celebrated as Idaho's premier timed race. Runners will navigate a flat, approximately 2.5-mile dirt loop course that gracefully borders the serene Boise River and Eagle Island pond, providing a beautiful natural backdrop for your endurance efforts. While largely flat and considered an easy course for accumulating miles, the terrain consists primarily of unimproved dirt and rock roads, with sections that can be muddy and uneven, requiring runners to stay attentive.

The Pulse Endurance Runs are renowned for their supportive and encouraging atmosphere, making it an ideal setting for both seasoned ultrarunners and those tackling their first ultra. A well-stocked aid station is conveniently located every 2.5 miles at the start/finish of each lap, offering typical ultra fare, hydration, and hot beverages, with a warming tent also available. Crews are welcome to support runners at the designated start/finish area, and ample parking is available adjacent to the course. Typical race day conditions in late March include comfortable highs around 52°F and lows near 33°F, with a modest 11% chance of precipitation. This non-technical, loop-based race allows you to focus purely on distance and personal achievement without the stress of navigation, creating a unique and rewarding experience as you push your boundaries.