Interlaken Trail Running Double HeaderA big vert trail running mountain marathon linking two peaks→ 40km   ↑ 3120mΔ 2070M ♦ DifficultΘ CWEach summer, I have some big trail running objective from my home. Thankfully, this is easy to do from Interlaken. The town is a hub for four different ridges, each requiring well over 1000-meter climbs. For one of those summer objectives, Kim …