The jack-of-all-distances finished 10th in the Leadville 100, and then seven hours later ran the Pikes Peak Marathon.
Walmsley broke the overall record by three minutes, and Flynn broke the women's record by 20.
The stories behind some of the craziest moments at this year's Hardrock 100.
The two runners covered 60 miles with 22,600 feet of elevation gain in 32 hours 50 minutes.
The Harvey Manning Peak Challenge saw its first finishers, Ras Vaughan and Seth Wolpin. It took them 78 hours 36 minutes.
Hamilton added an extra summit to the classic Colorado peak challenge Nolan's 14, and then cruised the regular route in less than 54 hours.
At the 2017 Bighorn 100, only 47 percent of the starters finished. Four of them did so hand-in-hand.
Seeking an experienced ad salesperson to join our team in western Colorado.
The race directors of some of the United States' most iconic ultras explain why they won't pay into the UTMB qualification system.
Bill Finkbeiner, a Northern California trail-running legend, is severely injured after being hit by a bicycle while running.