When climbing a route in the gym you have to start on designated holds, then only use the appropriate colored holds on the route to finish on the last hold of the climb without falling. π§π»ββοΈ πͺπ» If you knew nothing about the route before you climbed it (and made it), then you βon sightedβ the route. If you complete the route on the first try without falling, but you had watched someone else climb it first or you were given hints on how to climb the route, then that means you βflashedβ the route. Climbing hints = beta! Recently I on-sighted this 5.11c!