Obstacle courses are metaphors for life's trials—tall walls represent unaccomplished goals, narrow bridges represent the fear of failure, and mud pits represent the daily grind at the mud-pie factory. Conquer what holds you back with this Groupon.

$29 for an Entry to the Mud Factor Obstacle-Course Run ($65 Value)

At Glen Helen Raceway on Saturday, November 17, competitors tackle fun, challenging obstacles in waves that depart every half-hour, with the first available wave starting at 9 a.m. Finishers receive a medal and all participants receive a Mud Factor bandana; runners 21 and older also enjoy a complimentary beer. View the course map here. Participants must register online by Wednesday, November 7.

Mud Factor – Glen Helen Raceway

Each year, Mud Factor plows into towns across the country towing along a fun, yet challenging, course full of obstacles and mud to trudge through. It's 5 kilometers of dirty, sweaty madness that pits runners not against each other, but against their own expectations. At some events, attendees don event bibs and bandanas into their proper places before rocketing off the starting line in waves, dashing away to prove their superior hardcoreness to steep hills, muddy pits, and inner demons. Costumes are encouraged—be they Mud-Thing ensembles or strategically placed Speedos—for racers who like to rock their own style. By conquering the course, participants win the right to don achievement medals; those who've successfully wrestled life for legal-drinking status can celebrate their mastery of Mud Factor with a mug of beer.