More than 400 mountain bikers from 26 states and four countries line up Saturday, Sept. 5, for the 18th annual Park City Point 2 Point. The 75-mile endurance race starts at Quinn's Junction at 6:50 a.m., climbs 10,000 feet and finishes at Utah Olympic Park.

Both course record holders are back. Zach Carlton returns on the men's side, and Chelsea Bolton will chase a third consecutive women's title. Bolton's path got harder: six-time USA Cycling mountain bike national champion Ashley Green is in the field, according to race director Steve Aderholt.

The men's race also features Matt Wilson, the New Zealander who lost the Leadville Trail 100 to Midway's Keegan Swenson by just a tire's length on Aug. 16. Both finished in 5 hours, 20 minutes and 26 seconds, according to Pinkbike. Wilson now turns to Park City's single track, where the course record stands at 5 hours and 54 minutes.

Aderholt has called the race one of the top endurance mountain bike events in the country, KPCW reported. The course runs clockwise from Round Valley up through Deer Valley, drops to the base of Park City, climbs to the crest at Shadow Lake, descends to Park City Mountain Resort and crosses to the finish at Utah Olympic Park. Ninety percent of the 75 miles are single track.

"Over 10,000 feet of climbing, and then 10,000 feet of descending as well, so there's a lot of climbing, a lot of hard trails on there," Aderholt said on KPCW's "Local News Hour" on Sept. 1.

The first finisher is projected to reach Utah Olympic Park around 12:50 p.m., according to TownLift. Most riders cross the line between 3 and 5 p.m. Competitors who have not reached the base of Park City Mountain by 3:30 p.m. are pulled from the race. About 35% of the field does not finish, due to crashes, mechanical problems, exhaustion or the cutoff.

Locals can still ride area trails on race day, but Aderholt recommended planning around the course. Trail users heading out before noon should stick to Park City Mountain, Canyons Village and Utah Olympic Park trails. After noon, Deer Valley, Round Valley and Lost Prospector are the better options.

Rain is not expected until Sunday, Sept. 6. Residents can track riders live at track.brooksee.com, and a few volunteer spots remain through the race's signup page on bikesignup.com.