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A climbing route (German: Kletterrouten) is a path by which a climber reaches the top of a mountain, a rock face or an ice-covered obstacle. The details of a climbing route are recorded in a climbing guidebook and/or in an online climbing-route database. Details recorded will include elements such as the type of climbing route (e.g. bouldering route, sport climbing route, traditional climbing route, ice climbing route, and alpine climbing route, etc.), the difficulty grade of the route–and beta on its crux(es)–and any risk or commitment grade, the length and number of pitches of the route, and the climbing equipment (e.g. climbing protection gear) that is needed to complete the route.
There are definitions as to what is a valid ascent of a route (e.g. the redpoint in rock climbing), and the class or style of ascent (e.g. onsighted, flashed). The coveted first ascent (FA), first free ascent (FFA), and first female free ascent (FFFA), are usually recorded for important routes. After a route is established, variations can be created (e.g. directessimas, sit starts, or enchainments), and climbers will try to improve the "style" in which the route is climbed (e.g. minimizing aid climbing or other supports such as oxygen or fixed ropes). Some climbers limit the in-situ protection (e.g. greenpointing), or even free solo the route. Others seek to set speed climbing records on routes.
The ascent of ever-harder routes is an integral key part of the history of climbing, and each type of climbing has notable routes that set major new milestones. There are ongoing debates amongst climbers about routes including the naming of routes, the creation of new routes by artificially altering the surface (e.g. chipping in rock climbing), the role of completely artificial indoor routes (e.g. The Project), the level and maintenance of in-situ protection on routes (e.g. providing permanent bolted protection anchors) and the ethical issue of retro-bolting (e.g. turning traditional climbing routes into safer sport climbing bolted routes).