From Pont-Saint-Martin an attractive detour (34km/21mi) can be made up the Valle di Gressoney, following the deeply indented and regularly dammed course of the Lys, via the village of Issime (14km/9mi; 960m/3,168ft), which was founded by German-speaking settlers from the Valais in the 13th century, and the little holiday resort of Gressoney St
-Jean (14km/9mi; 1,385m/4,571ft) to Gressoney-La-Trinité (1,635m/5,396ft); from which a chair-lift leads to Punta Jolanda (2,333m/7,699ft; upper station 2,247m/7,415ft) and also a cabin cableway to Lago Gabiet (2,367m/7,811ft; upper station 2,342m/7,729ft).