https://www.walkingenglishman.com/ldp/LDP/Q/quantockgreenway.pdf
The Quantock Greenway is a footpath within the Quantock Hills in Somerset which opened in 2001.The route of the path follows a figure of 8 centred on Triscombe, the northern loop taking in Crowcombe and Holford is 20 miles (31 km), the southern loop to Broomfield is 18 miles (29 km).
Circle well marked trail around Spa town Harrogate North Yorkshire,UK
"Prenj's 11" is a loop traversing all Prenj's peaks higher than 2000 m. It was long considered impossible to climb all 11 of them in one day so it's quite an undertaking. It's not the length that makes it hard as it's really not that long. It's not even the vertical gain that creates problems, which is massive considering the length. It's the terrain that is brutal together with the fact that most of the route is unmarked and off trails what makes it challenging.
Entire length of Winnipeg’s perimeter highway.
Northbound on the Pacific Crest Trail from Hwy 80 to Hwy 49 in California, PCT CA Section L.This is a point-to-point run. This section runs approximately 37 miles (although some have registered 40 miles), with approximately 5111 ft of vertical ascent, and approximately 7000 ft descent. Start at the PCT trail head on the south side of Interstate 80 in Soda Springs, CA, near Boreal Ski Resort. Cross through the tunnel underneath I-80 and embark on a scenic route that climbs through two mountain passes; Euer Saddle elevation 7250ft, and Castle Pass elevation 7913ft.