This is the map I used for Sunday’s game where the DDC encountered both a group of Ice Trolls and then a far more dangerous Dire Troll that had been buried in the stone circle. Rather than being a ravine environment, the intention was more to have a raised ridgeway or track through mountainous terrain that sloped away either side.
I set the adventurers at the top of the map, emerging from between trees into the more open area, and the trolls initially in and around the rough circle of stones. The map is designed as a 25×30 portrait area, and was exported from Dungeon Alchemy. The zipfile is mountainpass.zip and you’re welcome to make use of it and the lighting information as you need – or you can just copy and download the map below without any other information.