The Critter

The Critter is an endurance running event in Waverly, Iowa, at the Ingawanis Adventure Base. It offers multiple timed options for ultrarunners: 4-hour, 8-hour, and 12-hour formats. While the specific course details aren’t listed, the venue suggests a trail-focused, rugged setting typical of ultramarathons.

The event is promoted on Ultrasignup with a registration deadline of December 28, 2025. The listing highlights a focused, endurance-oriented atmosphere and the ability to register through the organizer’s page. The mix of durations and rural Iowa location appeal to runners seeking a long-duration challenge in a natural, outdoor environment. Visit the organization's website for the most recent information.