To “flash” a boulder or route is to complete the entire sequence on your first try. It effectively requires the climber to both read the route correctly, ensure that they have warmed up to a point where they will not become tired on route, and then, most challenge, execute their proposed sequence successfully.

What does Flash mean climbing?

In the world of climbing, specifically sport climbing, the words “on-sight”, “redpoint”, and “flash” all refer to successfully lead climbing a route; conversely, if you follow a lead climber while you’re on top-rope than you’ve “top-roped” a route.

What is Onsighting climbing?

Simply put, climbing onsight means climbing a route “clean” in one go without getting beta or taking a good look at it before trying it. It’s the ultimate test of your mental and physical climbing abilities. The general consensus is that it’s fine to spy out and plot a route from what you can see off the floor.