Timothy Olson is an American ultra-runner who was the former recordholder (fastest known time) for the Pacific Crest Trail in 51 days, 16 hours and 55 minutes.

After problems in his personal life, he dropped out of college but things improved when he took up coaching in Amherst.

Moving with his wife Krista to Ashland, Oregon he met a group of ultra-runners and joined them in training.

[8] In 2014, Olson won the "Male Runner of the Year" award at the Endurance Live sports awards organised by the Competitor Group, Inc.[9] On Thursday, July 22, 2021, Olson set a new men's supported fastest known time (FKT) on the 2,653-mile Pacific Crest Trail (PCT) in the western United States.

Olson started at the PCT's southern terminus on June 1, hiking and running an average of 51.3 miles per day.