Unfortunately, the closest free fast travel point to the Cranberry Bog Treasure Map #2 is The Foundation location in the Savage Divide. So, I fast travel there, and then fast travel again from Foundation to the Ranger District Office — the Ranger location is in the top northern part of Cranberry Bog. The Ranger Office and the Lookout are dead next to each other on the map, meaning either is a viable fast travel pick. You could save the caps and slog there on foot, but I paid caps rather than ‘run time’ for the trip. Once I arrived at the Office, I headed west toward the Ranger Station. When I got to the fence, I went up and over. I could've gone a few more steps and simply walked through an opening, but I never really grew up. I ran into a fair number of Scorched, and I took a detour up to the station top for a Slasher mask. I found nothing hugely valuable or dangerous beyond a few hostiles and some scrap junk.
After the detour, I put the tower to my back so I was facing east. From there I ran along the dried-up riverbank, keeping it on my left. Once I came to a wooden bridge over the no-longer-flowing waterway, I crawled underneath it. The Cranberry Bog Treasure Map #2 is directly under that bridge, next to a patch of Brain Fungus — I hear it has adaptogenic or maybe hallucinogenic properties, either could be why I can't remember which... The treasure mound is dark brown with gray rocks in it. I filled my backpack near to bursting and headed to Watoga Station to settle up with a friendly vendor bot there.