The Boulder resident netted $15,000 for his first-place showing.
Several top finishers were from the Beaver State.
Meghan Peyton was the surprise winner on the women's side.
He says the South African ultra's appeal is its difficulty.
The B.A.A.'s rolling admission process kicks off next week
The top American at Boston dwells on his next steps.
Nearly 15,000 participants take part in half-marathon, 13.1-mile relay and 5K.
The four-time Olympian hopes to add another U.S. title to his resume.
Organizers hope to raise enough money to dig one well in Haiti.
There was a 16% increase in charitable contributions this year.