The Martial Glacier sits above Ushuaia on the mountain slope directly behind the city. Getting there takes about 45 minutes on foot from the upper end of town, or you can take the chairlift (aerosilla) that runs most of the year from a base station on Av. Luis Martial. The lift terminates around 1,000 metres elevation; from there a trail continues steeply up to the remnant glacier and spectacular views over the Beagle Channel and the city below.
The hike beyond the chairlift is moderate but requires some scrambling on loose rock near the top. The views over the channel on a clear day are among the best available around Ushuaia without a serious climb. Bring wind protection even in summer — conditions can change quickly.
The chairlift also serves as a ski area in winter, when the runs above Ushuaia attract local and visiting skiers. It is not a large or demanding ski area, but the setting is extraordinary.