The Merrell Down and Dirty Obstacle Race is in its second year at Riverside Park in Hartford. The event features two race courses and more than 20 obstacles. Athletes experience an action packed day with family and friends while giving back to our military heroes. Racers compete on either 5K or 10K courses that includd military-style obstacles, mud crawls and strength challenges. Even the littlest enthusiasts get in the action by particpating in the Adventure Kids race courses — a one-mile mud run or a shorter adventure dash, all ending in the massive mud pit to crawl to victory. Photo courtesy of riverfront.org.