Some of ultrarunning’s biggest names were in Healdsburg, Calif., for the Lake Sonoma 50. It was a fast day on the trails, as both the men’s and women’s winners set a course record.

On the men’s side, Alex Varner set a course record is 6:09:39, running away with the victory over Ryan Bak (6:23:25) and Jared Hazen (6:31:54).

On the women’s side, Stephanie Howe set a course record in 7:08:23 to take the victory.

Here are some photos from the day, taken by Derrick Lytle.

2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50
2015 Lake Sonoma 50