The Critter

Waverly, United States • 31 Dec 2025

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.

Race information

12 km
12hrs
8 km
8hrs
4 km
4hrs
Visit the organization's website for the most recent information.
Trail runs nearby

Meyerhoff's Mayhem is an endurance event held at Big Woods Campground in Cedar Falls, Iowa. The format consists of 4-mile runs every 4 hours across a 48-hour period, with an optional 2-mile add-on after the last leg. The course starts at the tent area and uses a mix of paved trails and a nearby disc..