The Euschelspass is a hidden gem. Travel by public transports to Schwarzsee. I recommend you to get out the last stop "Schwarzsee, Campus". From there on a path leads through the forests of the beneath the "Breccaschlund", until you have reached the tree limit. From there, the actual pass isn't far. The two restaurants at the top invite to recover from the ascent, even though it's not a hard one. From now on, it goes downwards in the direction of the village of Jaun. Take your Tele-Lens with you, because in this part of the hike, the stunning mountain chain "Gastlosen" is always in sight.