[4] It remains inaccessible during the winter months of November to April since the pass becomes totally snowbound during this period.

[4] The lake's geology is similar to thet of the nearby Bara-lacha-la Pass, which is reported to be an early rifting event on the northern Indian passive margin, and the Basalts which are emplaced along the trans–tensional faults indicate that.

[3] The valley, which is a narrow gorge, is devoid of any vegetation up to Darcha, and thereafter it widens up to its confluence with the Chandra River at Tandi.

Plantations of trees and shrubs to meet fuel wood and fodder requirements have been done on the hill slopes.

[9] Lahaul-Spiti Valley is a common destination for Indian and foreign tourists on road trips, trekking, and motorcycling.

The NH 21 route from Manali to Leh covers the Suraj Tal Lake and the Bara-lacha-la pass.