Carsington Water, located between Wirksworth and Kniveton in Derbyshire, is a reservoir operated by Severn Trent Water. It’s definitely somewhere you could spend the whole day though we only went on a short walk around part of the grounds on this trip; there is a parking charge which you pay on the way out otherwise the site is free to visit. There were lots of trails towards the water we explored though do be mindful of important safety notices and don’t enter the water unless at a designated spot (the site has an Activity Centre with a watersports facility for sailing, canoeing etc. as well as for the hiring of bikes).
Louise Jayne's Blog 