Iffigenalp is an alpine cirque above Lenk at around 1,600 metres, reached by a PostBus from Lenk village (summer service) or a 90-minute walk from the valley floor. It is one of the more appealing high-valley destinations in the Bernese Oberland — a broad green bowl ringed by rock faces, with an alpine restaurant and several waymarked trails continuing to the higher ground.
The Iffigensee is a 20-minute walk from the bus stop, a small lake sitting below the limestone walls of the cirque. The path is easy and suitable for families. From the lake, more serious walkers can continue to the Rawil pass (2,429 m) or traverse across to the Wildstrubel range. These routes require appropriate footwear and attention to weather — the upper terrain is exposed and the passes hold snow into July in most years.
The PostBus service from Lenk runs several times daily from late June to mid-October; check the current timetable before planning. Outside the bus season, the walk from Lenk takes about 90 minutes each way on a well-marked path with modest elevation gain.