The premier expedition-length adventure race in the world is coming to the premier high-definition broadcast network this August, as Primal Quest Montana Presented by SPOT begins airing on HDNet starting August 8. The series will run for four consecutive Saturdays at 10:30 AM ET with an encore presentation at 2:30 PM ET.

Primal Quest has been called "The Worlds Most Challenging Human Endurance Competition", and HDNet viewers will have the opportunity to see why it has earned that moniker. Sixty co-ed teams of four will race non-stop for ten days across a course that is more than 500 miles in length. They’ll run, paddle, climb, and mountain bike their way through some of the most challenging terrain on the planet.

For more on Primal Quest and the upcoming Primal Quest Badlands Presented by SPOT event in South Dakota Aug. 14 – 23, go to EcoPrimalQuest.com

Summit County, Colorado is the next stop on the Adventure Xstream Race Series circuit. On July 25th, Summit County, a world-class recreation venue, will be welcoming nearly 300 adventure racers, ranging from coed elite teams to first-time challengers and weekend warriors competing in either 6 hour, 12 hour or 18 hour race courses.

Competitors at the Summit Adventure Xstream Adventure Race will test their skills in kayaking, orienteering, trekking, trail running, mountain biking, and optional inline skating across the Rockies. Additionally, team dynamics and mental strength will be challenged by navigating across the 20, 60 or 100 mile courses. People can race as solos, 2 person or 4 person teams.

Nestled into the heart of the Colorado Rocky Mountains, Summit County is home to some of the world’s finest skiing and alpine recreation. With four ski areas and trail networks , Dillon Reservoir, and thousands of acres of national forest scattered across its expanse, Summit County is one of Colorado’s best places to ski, mountain bike, hike and boat. Along with its natural beauty, this venue boasts one of the nation’s highest altitude courses. Racers will be clearing elevations of 12,300 feet during the event.

"We are extremely excited to be coming back to Summit County again this year," said Race Director, Will Newcomer. "It is a beautiful venue in the mountains and its close proximity to Denver makes it an easy venue for racers to get to. With the addition of a 6 hour race at this venue it makes it a great race for newbies to the sport."

For more information please visit http://www.GravityPlay.com or call 970.259.7771.

Renowned sports photographer Luis Moreira is on the ground at the Untamed New England expedition race.

He's posting tons of great photos to our Untamed New England gallery.

We got his latest at 8:30 this morning.

The following photos were selected from among 65 great entries. Winners will each receive a paid entry to the upcoming Odyssey One Day Adventure race compliments of team Checkpoint Zero/Inov-8 and Odyssey Adventure Racing.

Ellen Farseth of team WEDALI sleeping at the Michigan Expedition Race May 2007 in St. Ignace, Michigan

Asher Lohman and Jake Brewer at the Checkpoint Zero Adventure Race on March 8th, 2008 in Hiawassee, GA

Ron Sanders doing the "Spiderman" on a zip line in the Michigan Winter Adventure Race

Nick Kerr at the Natchez Trace Adventure Race in Tennessee in March 2008

If you submitted a photo, but didn't win you can still register for the race until July 13th.