Huashan's reputation for danger is not incidental to its religious character. It is the reason for it.
The shape
Five granite summits reaching two thousand one hundred and fifty metres, about a hundred and twenty kilometres east of Xi'an, the Tang capital.
Unlike Taishan, which is a long ascent by stairs, Huashan is close to vertical on several faces. The approaches include stairways cut directly into cliffs and, most famously, the plank walk on the south face: boards bolted to a sheer rock wall with a chain to hold.
Why difficulty attracted religion
Mountains that were hard to reach and harder to live on drew hermits, alchemists and recluses, people whose practice required separation from society and who regarded the difficulty as a filter rather than an obstacle.
Huashan accumulated exactly that population. The Taoist project of internal alchemy and the pursuit of transcendence needed somewhere inaccessible, and this was it. Caves and small temples were established in positions that took real effort simply to supply.
The inaccessibility also meant the mountain preserved things. Communities that could not easily be reached by armies or by administrators persisted through disruptions that flattened institutions on the plains.
The Western Peak
A shrine to the Western Peak was operating at the foot by the second century BCE, and the Xiyue Temple below the mountain dates in some form to the Han.
The Tang treated the mountain as bound up with the fortunes of the ruling house and gave its deity royal titles, the Li family claimed descent from Laozi, and Taoist institutions were correspondingly favoured.
Chen Tuan
The Cloister of the Jade Spring at the base is associated with Chen Tuan, a tenth-century hermit who stands at the head of a good deal of later Taoist internal alchemy and of the diagrammatic tradition that fed into Neo-Confucian cosmology.
He is said to have slept for very long periods, and to have declined repeated imperial summons, the second being the more historically significant, since refusing the court was itself a recognised religious posture.
Now
The China Taoist Association has held most of the mountain's temples since 1998, which places them under a state-supervised religious body.
Cable cars now reach two of the peaks. Huashan is not a World Heritage Site.