Isaac Updike (born 21 March 1992) is an American track and field athlete who competes in the 3000 metres steeplechase.

After graduating from EOU, Updike moved to Eugene, Oregon, joining Team Runner Eugene and working part-time at Dick's Sporting Goods to support his running, setting the goal of qualifying for the 2016 United States Olympic Trials in the 3000 metres steeplechase.

[3] At the 2018 USA Championships, Updike ran a personal best of 8:25.8 in the first round, the fastest time of the heats.

[4][5] Ahead of the 2020 US Olympic Trials, Updike set a personal best and clocked world leading time of 8:17.74 at the USATF Grand Prix at Hayward Field.

[8] In early 2023, he moved permanently to Flagstaff, Arizona to train with Under Armor's Mission Run Dark Sky team, under coach Steven Haas.

In June 2023, Updike ran a personal best time of 8:17.47 in the 3000 metres steeplechase in Nice, France.