Answer

Ashtapad Tirth, in Jain tradition, is the sacred mountain associated with Bhagwan Rishabhdev’s nirvana. It is described as being in the Kailash–Himalaya region, and the name “Ashtapad” is explained as “eight steps.” In traditional Jain descriptions, it is also connected with King Bharat’s golden palace, Sinha Nishadhya Prasad. ( jainfoundation.in)

If by “8 tonk” you mean the Ashtapad layout, the traditional explanation is not a fixed list of 8 tonks like some other tirths. Instead, the emphasis is on:

• 8 steps at the base,
• 24 niches for the 24 Tirthankars,
• and a sacred arrangement of idols in the pattern “4, 8, 10, 2” across the levels. ( jainfoundation.in)

Explanation

According to the Jain sources I found, Ashtapad is described as a lost or not currently known tirth in the Himalaya-Kailash area. The tradition says Rishabhdev attained moksha there, and King Bharat later built a grand temple there in memory of that nirvana kalyanak. Some texts also say that Gautam Swami visited it through spiritual power and worshipped there. ( jainfoundation.in)

The structure described in the modern Jain model is:

• 8 steps leading upward,
• 24 gokhalas/niches for the 24 Tirthankars,
• and the idols placed in four rows as 2 at the lowest level, 10 above that, 8 above that, and 4 at the top. ( jainfoundation.in)

Spiritual Understanding

Ashtapad is important because it symbolizes ascension, purity, and moksha-marg. The very meaning of “eight steps” reminds a devotee that liberation is reached through gradual inner elevation, not by ordinary worldly travel alone. In Jain tradition, it is one of the highest siddhakshetras because of its link with Bhagwan Rishabhdev’s nirvana. ( jainfoundation.in)

Takeaway

So, in simple words: Ashtapad Tirth is the sacred nirvana place of Bhagwan Rishabhdev, and its key feature is the 8-step symbolism, not a standard 8-tonk list. The devotional layout is centered around 8 steps, 24 idols/niches, and the 4-8-10-2 arrangement. ( jainfoundation.in)

If needed, I can also give you the 24 Tirthankars’ placement chart on Ashtapad in a clean list format.