Munising, MI, United States · Saturday, July 25, 2026

Fixed Distance 50K

Grand Island 50 km Race

Race completed

50 km Distance

1,135 m Climbing

4.2 Grit · Challenging

46.4112° N, 86.6493° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 23 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 7.5 hours 9:00 min/km average. Comfortable. Room to walk the climbs and stop at aid. Among the tightest 50K cut-offs we track. Measured against 1007 races of the same distance. Cut-off calculator →

Field size ~139 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, July

Daytime high 20°C

Night low 13°C

Rainfall Mostly dry

Daylight 15 h 09 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 221 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 50 km of trail with 1,135 m of ascent.

Trail Running Shoes23 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition50 km of self-supported fuelling between aid stations.
Hydration VestsPole attachment and chest-strap stability on steep ground.
Trekking Poles1,135 m of ascent to walk up.
GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Adidas

Terrex Speed Ultra

★★★★★ 4.5

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 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

Perimeter trail of a wilderness island in Lake Superior. 100 meter red sandstone cliffs, white sand beaches and the endless blue of Lake Superior, the largest freshwater lake on Earth. Runners take a plunge in the cool waters of the lake afterward.

Similar races

Other 50K trail ultras, closest in distance first.