I used this map for an adventure loosely based on JRR Tolkien's poems The Mewlips and Knocking at the Door.

"Beyond the Merlock Mountains, a long and lonely road, Through the spider-shadows and the marsh of Tode, And through the wood of hanging trees and gallows-weed, You go to find the Mewlips - and the Mewlips feed"

https://tolkiengateway.net/wiki/The_Mewlips

The map is 40x30. When I used it I set each square to represent about a half-mile, although you could scale it anyway that suits your needs.

There is also a close-up map to represent the Mewlip's lair