Copper Harbor, MI, United States · Saturday, May 29, 2027

Timed 12 hours

Back 9 12 Hour Endurance Run

255 days away
not publishedn/a Distance
not publishedn/a Climbing
not publishedn/a Grit

We hold no course length for this race — a timed or backyard event is measured by the clock, not the kilometre — so there is no Grit score to give you.

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47.4681° N, 87.8888° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~9 Tiny. You will run alone for most of it.

DUV results for the 2026 edition (12h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, May

Daytime high 8°C
Night low 4°C
Rainfall Mostly dry
Daylight 15 h 35 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 201 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for this trail race.

Asics

Gel Trabuco 12

★★★★★ 4.5

Topo Athletic

Traverse

★★★★★ 4.5

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Suunto

Vertical

Titanium GPS watch with solar charging, offline maps, and 140-hour GPS battery.

$630 ★★★★★ 4.5
All gear guides →

Course Notes

the Run takes place on a 3.5-ish mile loop at the historic Keweenaw Mountain Lodge in Copper Harbor, MI. Runners will wind their way through a mix of Back 9 trails, golf course, hills, mud, and forest with spectacular views of Brockway Mountain.

Similar races

Other trail ultras of the same format.