In 1989 the Magog Trust, a charity and registered company created for the purpose, bought of former farmland surrounding Little Trees Hill for £327,100 so that it could be returned to chalk grassland and opened to the public. The reserve was named Magog Down. Some of the money to buy the land came from the sale of Gogs to the general public: these were notional areas of land costing £5 each but without title or rights. As well as re-establishing chalkland plants and insects, Magog Down has become well used for recreation, and is very well used by dog walkers. A 5-mile running race involving two laps of the reserve and a shorter fun-run have helped raise funds for the local primary school for several years. The Cambridge University Hare and Hounds running club have also used Magog Down as the venue for their tri-annual hosting of the RAF Match.