When normies want to set lofty fitness goals for themselves, they train for half- or full-marathons. If they’re feeling ambitious, perhaps they shoot for a triathlon or a Tough Mudder. For the type A personalities of tech, though, those events are sometimes warmups, literally, for even more extravagant athletic feats.

Last Friday night, for example, Randi Zuckerberg—an early Facebook employee and the host of a tech-themed radio show on SiriusXM—crossed the finish line in Flagstaff, Ariz., at the end of a 257-mile ultramarathon called the Cocodona 250. Zuckerberg said that 10 of the 16 marathons (26.2 miles) and 3 of the 10 ultramarathons (31 or more miles) she had run over the prior few years were part of her training regimen for the grueling Arizona race, which took her 113 hours to complete.

“The Boston Marathon I did as my final long run,” said Zuckerberg, who is the sister of Meta Platforms CEO Mark Zuckerberg.