How did I find it?The Gleirschklamm (47.372 N, 11.308 E) is a hidden canyon at the lower end of the Gleirschbach. I was hiking, and my goal of the day was the Pfeis Hütte, at the end of the Gleirschtal or Gleirsch Valley. In small print, my map shows the canyon, but no trail running through it.
The details have eluded me, but somehow I stumbled upon the trail running the length of the canyon anyway. Maybe I just followed the path that crossed its lower end, and saw it right there? Or did I hear it when I talked to one of the locals? It's too long ago now, I don't remember. But it sure was a beautiful canyon!
It was August 18, 2007.
Getting thereFrom Scharnitz, head east along the Isar, into the Hinterautal. At first, you can either follow the trail on the south side of the Isar, or take the road on the north side. If you follow the road, then about 2.5 km into the valley there is a restaurant, Wiesenhof. At this point you leave the road and cross the Isar on a small bridge, to get to the south side as well.
At the first junction after the bridge, go left, further into the valley, high on the south bank of the Isar. After some 2 km you reach the canyon. There is a bridge over it, leading to the dirt road (closed to motorized traffic) in the Gleirsch valley - don't go that way, you cannot see the canyon from the road.
Instead, take the trail into the valley along the Gleirschbach. You don't have to get wet to follow it. About 2 km further south, the trail ends at a bridge crossing the canyon. At this point, you have various options. The bridge leads to the dirt road again. Alternatively, you can retrace your steps, or you can go to the right instead of crossing the bridge, and hike back through the forest. My guess is that the last option, while the longest, is also the most rewarding.
The map I carried was the 1:50000 Freytag & Berndt WK 322, Wetterstein * Karwendel * Seefeld * Leutasch * Garmish-Partenkirchen, but, as I wrote, the route through the canyon isn't on there.