Jed Smith 100K Men's Race: Billy Mertens Owns the Fog

By MyRace AIJanuary 31, 2026
  • Solo champion: Billy Mertens, 59, of Louisville, CO, crossed in 8:05:31 — the only man to finish the 100K.
  • Wire-to-wire: Mertens held 1st among the men from the opening checkpoint through the final one, never relinquishing his position.
  • Standout split: He posted the fastest split on the Out & Back→Lap 1 segment — not just among the men, but fastest among all runners in the field.
  • Pace: He covered 62 miles through Sacramento's dense morning fog at a 7:49/mi average — a steady, measured effort across the full distance.

There's a particular kind of grit required to toe the line at a 100K and find yourself the only man in the field. Billy Mertens, 59, from Louisville, Colorado, didn't just show up — he delivered, crossing the finish in 8:05:31 at 7:49 per mile through cold, fog-soaked conditions that kept the humidity locked at 93% all morning.

Mertens led the men's race from start to finish — every checkpoint, every lap, every mile. But the number that stands out most isn't his place; it's his Out & Back→Lap 1 split, which was the fastest of any runner on that segment across the entire field. That's not a participation footnote — that's a genuine performance marker in a field that included everyone on the course.

At 59 years old, running 62 miles in just over eight hours through a Sacramento fog bank, Mertens made his statement clearly and without company. The finish line was his, and the clock backed it up.

The course

Course map — Jed Smith Ultra Classic - 100K
119 ft range ≈ 10 stories (12 ft each)×1073 ft-46 ft031 mi63 mi
62.6 miles · 3,192 ft elevation gain · 74 ft max elevation
The course · start finish · © Mapbox © OpenStreetMap
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