Hiking. There are four trails up the mountain: two from the south, one from the north, and one from the northwest. From the south, the more scenic "western steps" start from 1 Ciguang Pavilion (慈光阁, Mercy Light Temple), past the Yuping cablecar, while the 2 "eastern steps" start just below the Yungu cablecar. In the north, a trail starts from the base of the Taiping cableway, at the Songgu Forest (松谷禅林) entrance. The far more obscure but very scenic route from the 3 northwest entrance via the Fairy Bridge starts at the end of a small local road. The northwest entrance has no bus service and no taxis, is not near any village, and its parking lot is usually completely empty, so ascending via this route requires a taxi and descending requires planning your transportation in advance. It is also sometimes closed in winter.
Once on the top of the mountain it is possible to do a few walks. Highly recommend is the walk through the West Sea, for its stunning scenery. This area is also accessible by a funicular railway from the top (¥100). The connection between the Fairy Bridge and West Sea is closed (2018).
Note that the trails on the mountain are generally industrial-scale stone or concrete walkways, wide and flat, with railings, often lighting, and a crew of workers to clear off snow, garbage, and leaves. This is not a trek through the wilderness.
One of the famous attractions at Huangshan is its hot springs, located above Tangkou.