The DTE Energy Foundation Trail system (https://dtetrail.org) out by Green Lake in Waterloo has a range of trails that are very popular among the mountain biking community (which was the intended primary audience for these trails), but trail runners are most welcome too (as indicated by their website and all the cyclists that wished me a great run as I ran past them today).

The Appalachian Trail from Rte 16 (east of Waynesboro, PA) in the south to Pine Grove Road in the north (just north of Pine Grove State Park). Roughly 42.59 miles and 5,836 elevation gain.

In Ramsau bei Berchtesgaden,

Route starts from the barrier of the Hintersee Klausenbach House and follow the official trail to the summit of Hochkalter.

You must to follow the marks during the last 1000m climbing to the summit.

Downhill is back to the barrier again.