It is a long-distance trail race that covers 105 miles over the Lakeland fells, and includes in the region of 6,300m of ascent and consists almost entirely of public bridleways and footpaths.
The route starts in Coniston and heads south before completing a clockwise loop which takes in the Dunnerdale fells, Eskdale, Wasdale and Buttermere before arriving in Keswick.
From here, the route heads to Matterdale and continues over to Haweswater before returning via Kentmere, Ambleside and Elterwater to the finish back at Coniston.
The overall time available for the route is 40 hours and competitors can stop to sleep at one of the 14 checkpoints.
This is not an event for the faint-hearted and only experienced ultra-distance runners are encouraged to apply. Runners are also required to rely on their own navigational skills to complete the course.
The 100-mile event started at 6pm on the Friday and the final cut off was 10am on Sunday. It is stated that 40-50 per cent of the 100-mile competitors do not finish the course, while 80-90 per cent of those drop out prior to or at the halfway point.
Greenhalgh was able to finish the race is an epic 38hrs 8mins.
Meanwhile, Johanna McManus travelled to Media City, in Salford, for the July instalment of the Run Through Media City Races series.
She completed the 5k in an amazing 22:38, and was the second female to cross the finish line and first in her age category.
Parkrun saw members travelling all over the UK but closest to home, four members joined 242 runners at Bolton.
Anthony Maxwell was the first Lostock member to finish in 26:04, followed by Rachel Hancock (27:31), Ian Burns (30:00) and Sheila Garewal (31:22).
Results elsewhere: Haigh – Rachel Stevens 28:58; Delamere – Sinead Carney 34:43; Hafan Pwllheli – Janet Rhodes 28:00; Morecambe Prom – Paul Edwards 20:10; Seaton – Chris Taylor 29:49, Karen Taylor 35:28.