[Editor’s Note: Photographer Kirsten Kortebein captured these images of the 2016 The North Face Endurance Challenge 50 Mile Championships. Please enjoy! All photos: iRunFar/Kirsten Kortebein and reuse without permission is not permitted.]

Lacing ’em up for the 5 a.m. start in California’s Marin Headlands. Photo: iRunFar/Kirsten Kortebein

The watch says Chile’s Moisés Jiménez has 10 more minutes to warm up before go time. Moises would finish 32nd overall. Photo: iRunFar/Kirsten Kortebein

iRunFar’s Meghan Hicks sends news to the trail running world by satellite from the remote start line. Photo: iRunFar/Kirsten Kortebein

Firing off into the early morning, the start of the 2016 The North Face Endurance Challenge 50 Mile Championships. Photo: iRunFar/Kirsten Kortebein

Greece’s Dimitris Theodorakakos runs away from the sunrise at mile 19 and toward a sixth-place finish. Photo: iRunFar/Kirsten Kortebein

David Laney (left) and Paddy O’Leary climb high in the Headlands. The pair would finish third and ninth, respectively. Photo: iRunFar/Kirsten Kortebein

Sun seekers on The North Face Endurance Challenge 50 Mile Championships course. Photo: iRunFar/Kirsten Kortebein

Magda Boulet and a high-five tunnel at mile 32. Magda would run on to second place. Photo: iRunFar/Kirsten Kortebein

Zach Miller battled all the way to the line for his win of the 2016 The North Face Endurance Challenge 50 Mile Championships. Photo: iRunFar/Kirsten Kortebein

An exhausted Hayden Hawks is helped by Zach Miller. Hayden and Zach dueled all day before Hayden finished second and two minutes back in his debut 50 miler. Photo: iRunFar/Kirsten Kortebein

A moment of reflection for third-place David Laney just after finishing. Photo: iRunFar/Kirsten Kortebein

Jorge Maravilla celebrates with his son, Joaquin, after his fourth-place finish for the second year in a row. Photo: iRunFar/Kirsten Kortebein

2016 The North Face Endurance Challenge 50 Mile Champion Ida Nilsson looks within following her finish. Photo: iRunFar/Kirsten Kortebein

Third-place Ruth Croft manages a little smile amidst telling stories of pain at the finish line. Photo: iRunFar/Kirsten Kortebein