Solo climber Alex Honnold has added another feat to his record book by climbing the 1,500-foot limestone big-wall route El Sendero Luminoso in El Potrero Chico, Mexico.

What makes his latest accomplishment even more impressive is that he climbed it in three hours.

This challenging route includes many pitches of 5.12 climbing, and it typically takes climbers two days to complete.

Climber and North Face team member Cedar Wright traveled to Mexico at the beginning of 2014 to help Honnold prepare the route.

“I climbed the route four times with Alex, and each time I was struck by how complex and tenuous the climbing is,” Wright told Outside. “There are hundreds of hand and foot moves to remember, and at times it’s just a few millimeters of your fingers and toes that are keeping you connected to the wall. Mostly I just tried not to think about him soloing the route while I was up there because it was so terrifying.

“Alex will downplay the achievement, but I can assure you this is one of the most cutting edge big-wall solos of all time,” Wright continued.

Unlike Wright, Honnold didn’t seem quite so terrified while giving an interview with the magazine.

“It felt pretty straightforward,” said Honnold, who mentioned that everything went as planned. “Once I started up, I was like, ‘This is awesome.’ I didn’t blow a single foot—like a ballerina.”

Camp 4 Collective filmed the climb for The North Face.

Image is a screenshot from video by National Park Foundation on Vimeo