This year, the start and finish is at Wimbleball Lake, and the routes takes in Wheddon Cross, Dunster, Minehead, Lynmouth, and Simonsbath.
The event is already considered one of the best and most challenging cyclo-sportives of the year and offers a choice of routes over either 100 miles or 100 kilometres.
The Exmoor Beast has been devised by professional event co-ordinators and experienced sportive riders, who have been observing and learning from the varying organisational standards of UK promotions.
Chief organiser, ex-Royal Marine Marcus Di Vincenzo, said: “The domestic sportive scene needed a spectacular fixture, which is a fitting finale to the annual calendar and we will provide all the trimmings that will form the ideal climax to the season.
“We have the expertise and highly-trained manpower to enable the Exmoor Beast to be safely and successfully tamed, providing you give it the respect it deserves and have prepared properly.
“If the awesome climbs do not take your breath away, then the fantastic scenery certainly will and our aim is to make the journey from entry to post ride recovery smooth, enjoyable and truly memorable.”
Exmoor Beast is being held in partnership with BikeSomerset and this year has attracted nearly 1,000 competitors.
The first riders set off at 7 am on Sunday and the first to arrive back at Wimbleball are expected at about 1.30 pm.
The race will be raising money for the charity National Society for the Prevention of Cruelty to Children.
- Our photograph shows riders crossing the finishing line in last year's Exmoor Beast. Photo by Active Exmoor.