Greenbush, WI, United States · Sunday, October 11, 2026

Fixed Distance 50 mi

Glacial Trail 50 Mile Race

25 days to go

80 km Distance

not publishedn/a Climbing

4.0 est Grit · Challenging

Calculated from 80 km alone — the organiser has not published an elevation profile. Read 4.0 as a floor, not a verdict.

45.0803° N, 68.6509° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 12 hours 9:00 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50 mi cut-offs we track. Measured against 455 races of the same distance. Cut-off calculator →

Field size ~21 Small. Long stretches with nobody in sight.

DUV results for the 2025 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 14°C

Night low 4°C

Rainfall Showers likely

Daylight 11 h 15 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 73 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 80 km of trail.

Trail Running Shoes80 km of trail — cushioning that is still there in the last quarter.
Race Nutrition80 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 80 km, without the bounce.
HeadlampsA 12 h limit puts you out there after dark.
GPS WatchesBattery life first — a 80 km day outlasts most full-GPS modes.

Salomon

Ultra Glide 4

$159.95 ★★★★★ 4.6

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Nathan

VaporKrar 12L

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

$170 ★★★★★ 4.6

Nitecore

UT32

Dual-beam trail running headlamp (1100 lumens) with spot and flood beams.

$100 ★★★★★ 4.5

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Course Notes

The Glacial Trail Run takes place in the northern unit of the Wisconsin Kettle Moraine State Forest. The trails consist of rolling hills with some rocks and other normal trail obstacles.

Similar races

Other 50 mi trail ultras, closest in distance first.