2026 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Modelled energy-cost change 4.7% versus flat · net elevation -0 m
Decision summary
Lower than 83% of comparable mapped races
10:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.
Historical race-date favourability, not a forecast
Stored GPS route
Quick answers
raceindex.org has a GPS course file for Bimbler's Bluff 50K Ultramarathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.
The Bimbler's Bluff 50K Ultramarathon route has 1,092 m of ascent, 1,092 m of descent and an estimated 4.7% grade-adjusted pace penalty versus a flat route.
The Bimbler's Bluff 50K Ultramarathon route starts at Guilford Lakes School, 40 Maupas Road North, Guilford, CT 06437. Underfoot, expect entirely un-paved: rolling forest roads or single track that can be extremely rocky. It passes inter-connected woodland preserves, Genesee Preserve and southern Connecticut forest. Unusual for a Connecticut event of this type in that runners do not complete the same loop multiple times.
3.
Its normalised GAP factor is 4.7% slower than a flat course, with about 1092 m of total ascent.