Mark began his racing career as a runner. Since high school, he has done countless road races and a handful of marathons. He started doing triathlons in college. In the 1990's, he took up kayaking and long distance hiking, and in 2000, he bought his first mountain bike.

He had competed in a dozen or so mountain bike races when he discovered adventure racing in the fall of 2000. His first race was in a 12 hour race in the mountains of North Carolina. Since then, he has competed in almost a hundred adventure races around the country ranging in length from 6 hours to 10 days.

In 2004, he did over 20 races including a solo effort at the 5 day 2004 Beast of the East.

In 2005, he teamed up with Jen Marsh and Jason Magness and did the Beast of the East - a 5 day adventure in 35 degree rain.

In 2006, he did the 10 day Eco Primal Quest in the Utah desert. Jen's Men finished 24th on the full course.

In 2007, he took up ultra-marathoning (30+ mile trail runs) and also tried his hand at some international adventure races (the 2007 AR World Championships in Scotland and the 2007 Australia XPD). To end the year, Mark and teammates Sara Dallman and Jason Magness, competed in the USARA National Championship 30 hour race. They finished 14th out of 80 teams.

In 2008, Mark did the 10 day Primal Quest in Montana, won the 4 day Coast Raid in Canada, and competed in Guadelupe in the Carribbean for 6 days. In October, he finally stopped to rest his torn left adductor.

2009 saw 3 expedition races (Patagonia, Sweden, Primal Quest) and a 3rd place finish at USARA Nationals along with 15 other races around the US.

In 2010, Mark plans to take up multi-day stage running including races in Costa Rica, the Rockies, and the Alps.