Hal Koerner (born January 23, 1976, in Morgantown, WV) is an American distance runner specializing in ultramarathon running. He is the owner of a specialty running store, Rogue Valley Runners, located in the mountainous Southern Oregon town of Ashland. He is one of the subjects of JB Benna's feature-length documentary "Unbreakable: The Western States 100".
He is Race Director of the Pine to Palm 100 Mile Endurance Run - A hundred-mile footrace from Williams, OR to Ashland, OR held each year the second weekend in September. In addition to that race he also directs the Lithia Loop Trail Marathon in Ashland, OR.
In 2014, "Hal Koerner's Field Guide to Ultrarunning" was published and released by VeloPress. The book details training for an ultra marathon; from 50k to 100 miles. It debuted #1 in its category on Amazons bestsellers list.
Hal has held the Fastest Know Time for the Colorado Trail (489 miles) and the John Muir Trail (221 miles). To date he has completed over 150 ultra marathons.