As an experienced ultramarathon runner with over 100 races under my belt, I highly recommend the Another Damn 50k in Englewood, Ohio for beginner ultramarathoners. This race is a manageable distance for first-timers, and it's located in the Buckeye State, making it an easily accessible race for those living in Ohio. If you're not located in Ohio, or if the Another Damn 50k doesn't appeal to you, there are plenty of other options out there. A great resource for finding ultramarathons in your area is runningintheusa.com.