Bear 100 — Run Time

Next Race

September 25, 2026

173

days to go

A classic mountain 100-miler through the Bear River Range between Utah and Idaho, the Bear 100 climbs from Logan Canyon to the high alpine ridges before descending to Fish Haven on Bear Lake. High altitude, early-season snow, and rugged singletrack make this a demanding test of mountain running and self-reliance.

ITRA 6 Endurance Points

Est.

2003

Distance

161km / 100mi

Course

Point-to-point

Surface

Mountain Trail

Elev. Gain

6700m

Elev. Loss

6700m

Field Size

~350

When

September

Time Limit

36h

THE COURSE

Gain

+6700m

Loss

-6700m

MI 0

KM 0

Hardware Ranch Start

Runners begin at the Hardware Ranch Wildlife Management Area in Logan Canyon. The early morning start sends runners climbing into the Bear River Range as the sun rises over Cache Valley.

ELEV: 5600ft

MI 18

KM 29

Tony Grove

The trail climbs to Tony Grove Lake at over 8,000 feet. This alpine lake surrounded by limestone cliffs is one of the most scenic spots on the course and marks the beginning of the high-elevation running.

ELEV: 8050ft

MI 40

KM 64

Steam Mill Summit

The highest point on the course near 9,500 feet. Runners traverse exposed ridgelines with views stretching across the Bear River Range. Early-season snow is common at this elevation in late September.

ELEV: 9500ft

MI 62

KM 100

Beaver Creek Aid Station

Deep in the mountains, Beaver Creek provides a remote resupply point. The trail through this section follows creek beds and narrow canyons through dense aspen groves turning gold in autumn.

ELEV: 7200ft

MI 100

KM 161

Fish Haven Finish

The final descent drops runners into the tiny community of Fish Haven on the shores of Bear Lake in southeastern Idaho. Crossing the state line and finishing lakeside after 100 mountain miles is a memorable experience.

ELEV: 5900ft