Klemensker, Denmark · Saturday, August 28, 2027

Backyard

Bornholm Backyard Ultra

346 days away

not publishedn/a Distance

100 m 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.

55.1741° N, 14.8063° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~55 Small. Long stretches with nobody in sight.

DUV results for the 2025 edition (26h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 19°C

Night low 18°C

Rainfall Mostly dry

Daylight 14 h 10 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 5 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 with 100 m of ascent.

Trail Running ShoesCushioning on trail that is still there in the last quarter.
Race NutritionSelf-supported fuelling between aid stations.
Hydration VestsFlask capacity without the bounce.
HeadlampsA 26 h limit puts you out there after dark.
GPS WatchesBattery life first — an ultra outlasts most full-GPS modes.

inov-8

TrailFly Ultra G 300 Max

Graphene-enhanced grip with max cushion for ultra distance trail running.

$180 ★★★★★ 4.5

Adidas

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Nathan

VaporKrar 12L

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

$170 ★★★★★ 4.6

Petzl

NAO RL

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

$150 ★★★★★ 4.7

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

Backyard race around the city of Klemensker on the sunny Danish island of Bornholm. The course is a single loop on established trails. Every round is 6,7km. Every hour a new round starts. The race continues until one person is left, last one standing

Similar races

Other trail ultras of the same format.