Running was popular in Europe long before it caught on in America, which is why most races are measured in kilometers instead of miles and why most of the Pilgrims were eaten by bears. Race to the top of the food chain with today's Groupon: for $50, you get two admissions to the Racing Humans 5K Mud Run on July 2 from 8 a.m. to 10 p.m. at Three Palms Extreme Sports Park in Conroe (a $100 value). This Groupon includes a free beverage coupon.

Racing Humans throws racers of all experience levels into the mud in a fun, messy, and exhilarating race and outdoor festival. The race, which benefits the Fallen Patriot Fund of The Mark Cuban Foundation, splashes participants through mud and water and over challenging obstacles, covering them in gunk and deeply cleansing their pores. Break, water, and snack stations dot the race’s progress, and paramedics are on hand in case of an emergency. After the race, fireworks and live music from eight bands accompany the sweet reward of hoses, showers, and water-balloon barrages. Though the race is open to all fitness levels, Racing Humans recommends training for the event by running two miles every other day, as well as avoiding excessively sugary foods and bathing in rubber cement.

All participants receive a free T-shirt, medal, bandana, and numbered bib, and should arrive at least 15 minutes prior to their race time for registration. Runners will also be offered up to 18 half-price tickets to the Houston Astros during the 2011 season. You will be emailed purchase instructions one week after the race.