Back in January, The Bachelorette winner Zac Clark ran a 5K with his fiancée, Tayshia Adams. Now, Clark is back with a different kind of feat: running four miles every four hours for 48 hours—also known as the Goggins Challenge. The 37-year-old initially wanted to take place in the challenge hosted by The Maddie Project—a charity in association with North York General Hospital that focuses on youth mental health—from March 5 through 7 of this year, but he couldn’t because of scheduling conflict. However, since reading David Goggins’s Finding Ultra in 2020, Clark has been toying with the idea going farther.