For the serious riders the Gran Fondo itself is a 200km (124 mile) round trip taking in the Mendips, the Quantocks and Exmoor (the "hills" bit) and some easier stuff across the levels - mostly on the way back to give those weary limbs a break.
But you don't have to go for the big one because there is the Medio Fondo (142km - 88 miles, Mendip and Quantock Hills) or the Piccolo Fondo (71km - 44 miles just the Mendip Hills). By all accounts this is a great event to take part in with around 600 riders. It is not a race but a chance to see some awesome sights, meet some lovely people and get some brilliant exercise. Find out more one their very informative website with maps and gradient maps for all three routes.
Of course Gorge View Cottage provides the ideal base for all of this - but book early.