The most famous gorge in Salzburg is definitely the Strubklamm. Due to the dam wall, which is located above the canyon, there is no risk of the water in the canyon rising by leaps and bounds. This fact makes it possible that the tour can be done in almost any weather.
The Burggrabenklamm lies exactly on the border between Upper Austria and Salzburg. In this gorge, the bed load is almost constantly in motion. So it can be that the possibilities for jumping and sliding change completely after only a short thunderstorm.