Long-distance hikers Philip Carcia and Andrew Soares have set a new fastest known time for summiting New Hampshire’s 48 4,000-foot peaks in winter, breaking the old record by roughly 25 hours.

The pair finished their record-breaking winter trek atop Mount Tecumseh late last night after hiking for five days, 19 hours, and 58 minutes.

Along the way, the pair hiked more than 217 miles and climbed more than 77,300 feet while facing changing, unpredictable conditions.

“Temperatures have been very cold and trail conditions can only be described as consistently inconsistent,” Carcia wrote on Facebook early in the adventure on the morning of Christmas Eve.

In setting the record, Carcia and Soares averaged more than 37 miles and 13,000 feet of elevation per day.