Hubble is a short 10-metre (33 ft) bolted sport climb at the limestone crag of Raven Tor in Millers Dale, in the Peak District in Derbyshire, England.

[4] Hubble was an aid climbing practice route that used skyhooks to pass the first two bolts, which English climbers Ben Moon and Jerry Moffatt started working on in 1989.

[4] Moon and Moffatt had returned from a summer in France establishing some of the hardest sport climbing routes in the world on the limestone walls of Buoux, including Agincourt and Maginot Line, both at 8c (5.14b); they wanted to set these new grade standards at home.

[5][7][8] German Alex Megos is one of the few, with British climber Buster Martin,[9] who have climbed Hubble and Action Directe; he felt Hubble was very short and probably an 8c+ (5.14c) in the right conditions (i.e. fully dry),[10] although Megos caveated himself by noting that grading is not an exact science, and is subject to the climber's own style and preferences.

[16] More recent ascents of Hubble (e.g Matthew Wright and Buster Martin in 2020), have seen some climbers use a kneebar short rest – a modern sport climbing technique – at the crux section that can soften the difficulty slightly, although still maintaining the route at a consensus 8c+ (5.14c) level.