Trail Running the Niesen UphillBig Vertical Training Day!→ 7.5km↑ 1679mΔ 2362M♦ MediumΘ UphillTrail running the Niesen is a funny mix of extremes. It’s a beautiful mountain with a not so memorably beautiful trail that climbs 1700 meters, without interruption, to a stunning summit view. More than anything, for trail runners, it is the perfect big vert training climb. The trail is …