I was lucky enough to find another local mud race here in Pennsylvania for racers to try out, the Harrisburg Mudmash. This race is part of the local race series organized by the Harrisburg area YMCA, which provides some great running road races in the Central PA area.
I attended the Brewser 3 (for the third year, of course) which is hosted by one of the local breweries called the Appalachian Brewing Company. Not only is it pretty neat that you can eat and drink plenty after your race, but that the race begins and ends in the parking lot of the brewery/restaurant.
Make sure you check out the Acre Breaker Adventure Race in Manheim PA. The Acre Breaker race provides a great experience in a smaller loop course to give the racer and the race viewers a really fun experience. The course is on about an acre or so of land, but a number of obstacles and the running trail that is the course were a great surprise as I moved through the terrain.