by Brian Lipton

NORTHFACEOutdoor apparel maker and retailer The North Face has officially opened registration for its 2016 Endurance Challenge Series, which the largest trail running series in the world, has officially opened registration for all distances in all six races for the 2016 season.

The races will take place April 9-10 at Algonkian Regional Park in Sterling, Virginia; April 30-May 1 at Bear Mountain State Park in Bear Mountain, New York; July 16-17 at Blue Mountain Resort in Blue Mountain, Ontario, Canada; September 17-18 at Kettle Moraine State Park in Eagle, Wisconsin; September 24-25 at Park City Mountain Resort in Park City, Utah; and December 5-6 at Marin Headlands, San Francisco, California.

Each event includes seven distances ranging from 5K to 50 miles and a Kid’s 1K race. The Endurance Challenge Championship offers largest prize purse in the sport of trail racing, awarding $10,000 each to the top male and female runners in the 50 Mile distance.

Ultrarunning stars from The North Face athlete team, including Dean Karnazes, Rob Krar, Dylan Bowman and Rory Bosio, are expected to make appearances at events throughout the series.

“The Endurance Challenge motivates runners at all levels to experience the trails and challenge their physical limits,” said Katie Ramage, director of sports marketing at The North Face. “We are thrilled to bring the series back again this year and attract more people to the sport of trail running.”