Mt. Middleton is a tall mountain to the north of Harrisville. It features three areas: Fulface Rock (Japanese: 正面岩,Shōmen'iwa), Cicada Canyon (Japanese: かわせみ渓谷,Kawasemi keikoku) and the Summit (Japanese: キウチ山山頂,Kiuchi yama sanchō).
Mt. Middleton is first visited during Let's Go to Harrisville when the protagonist hears someone calling for help. They find Mirapo on Fulface Rock who states they wanted to climb the mountain to see the view but got lost and tired. The protagonist and Jibanyan carry them back down and they befriend them, giving them access to Mirapo warps. The protagonist then decides to scale the mountain to see the view at the top. However, at the top it begins to rain. The protagonist and Jibanyan play in the rain with Pallysol joining them, thinking they'll catch a cold if they're not sheltered. The protagonist is happy to play with Pallysol but something strange makes them leave abruptly.
In Yo-kai Watch 2, Fulface Rock has three yellow chests, one in the central east, one in the central west and one in the central north. Cicada Canyon has three yellow chests, one in the central-west, one in the central south and one in the far south-east.
