Surface runoff
This mountain is covered virtually entirely with moorland. Its northwestern slopes drain to the Cairnie Burn, whilst the northern and eastern slopes drain to Crynoch Burn. The western slopes yield surface runoff that drains into Cowton Burn. Curlethney Hill is situated approximately 0.9 kilometers to the east of Meikle Carewe Hill Surface runoff and drainage from Curlethney Hill also drain north to Crynoch Burn, at reaches above the Red Moss. Waters within the Red Moss are decidedly acidic, with measured summer pH values in the range of 5.68. These low pH levels may be caused in part by the peat drainage from the moorland on Meikle Carewe Hill.