This site has some info: https://besthike.com/s-america/patagonian-andes/cerro-castillo/

The 130km Huayhuash Circuit circumnavigates Peru's Cordillera Huayhuash. It is widely considered to be one of the top treks in the world. It includes numerous passes over 15,000' and up to 16,500'.

Here's a nice article about Choquequirao & the planned "improvements" to get more tourists in.
www.theguardian.com/travel/2014/nov/01/peru-choquequirao-inca-ruins-trek