The 2014 Dirty Duathlon and Dirty Bit Trail Run take place on the slopes of Holiday Valley on Aug. 31.

The Dirty Duathlon begins at 10 a.m. with a run/bike format. The Dirty Bit Trail Run is a separately scored, run-only event that starts with the Dirty Duathlon athletes at 10 a.m. and competes on the same 4.2-mile course beginning and ending at Holiday Valley’s Mountain Sports Center. There are no obstacles or manmade features, just challenging natural trails for a truly challenging and scenic experience.

Both events are chip timed and awards will be given in a wide range of age groups. Pre-registration is available at www.heartrateup.com. T-shirts are guaranteed to the first 200 entrants and as they last on race-day.

Race day registration is available beginning at 8 a.m. at the Mountain Sports Center, space permitting. Number pickup begins at 8 a.m. on race day as well.

The event concludes with a party, lunch and amazing door prizes. For more information, visit www.heartrateup.com.