Same circuit as CSF 20 but different route, (mostly). Going up to the side of Blorenge to cross the Tumble to go down then up Gilwern Hill. Then dropping down, via Carreg Maen Taro, to meet the CSF 20 and cross the B4248 and climb up to Coety Mountain, leaving the CSF to continue to Bobby?s Helmet and across to the Dog Memorial Stone and down to Varteg. To cross the A4043 to follow CSF 20 for a short while before turning towards Blorenge, via Carn y Defaid. Then up to Blorenge and direct route down to return down the steep track to the Car Park. Graded as hard with 4500 feet of ascent
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