MAMMOTH Endurance Gravel 2027.
Gravel ultra · Wellsboro, Pennsylvania · USA
1 May 2027 — Date as listed by a race portal; the organiser hasn't confirmed it yet.
MAMMOTH Endurance Gravel is held at Wellsboro in northern Pennsylvania, on the edge of the Pennsylvania Grand Canyon and its gravel roads. The long route is made up of two non-overlapping loops that both start and finish in the town centre, the longer one in the morning and the shorter in the afternoon; riders who take only the morning loop are done at halfway, and the shortest route is an abbreviated version of it. The organiser changes the course every year and reverses the direction of travel on some roads for the coming edition, and breakfast, lunch and the aid stops are included in the entry.
Entries open 31 Oct 2026Entry deadline: 4 Apr 2027bikereg
Frequently asked questions
When is MAMMOTH Endurance Gravel 2027?
MAMMOTH Endurance Gravel takes place on 1 May 2027 in Wellsboro, Pennsylvania. Check the organiser's site for the final word.
What routes does MAMMOTH Endurance Gravel offer?
The options are Full MAMMOTH (136 miles) (218.9 km / 136 mi, 3962 m / 12999 ft climbing), Half MAMMOTH (71 miles) (114.3 km / 71 mi) and Quarter MAMMOTH (29 miles) (46.7 km / 29 mi, 914 m / 2999 ft climbing), as published by the organiser.
How do I enter MAMMOTH Endurance Gravel?
Entries are handled by the organiser via bikereg. Registration opens on 31 Oct 2026. The button above takes you to the official page.
Dates, routes and conditions from the linked organiser sources; the official page always has the final word. Not affiliated with the organiser. Every entry is source-checked — nothing here is AI-generated or estimated.