Check out these great shots from one of California's most scenic off-road courses.
See what some of the best athletes from the track, roads and trail want to accomplish this year.
World champions will race in Hawaii this weekend.
Sunday's XTERRA Trail Run World Championship will send runners through a historic ranch where several movies have been filmed.
Max King is aiming for his fifth XTERRA Trail Run World Championship. The 2013 XTERRA Trail Run World Championship will feature defending
The 33-year-old has won it four times.
The race is doubling as this year’s Skyrunner World Series Ultra Championship.
Last year's women's winner, Lindsey Anderson, returns as well.
The men's and women's defending champions will be there.