2020 Map of Haystack Mountain

Evidence of the region's historical transit importance is found along the southern edge, where the E Old Oregon Trail Rd follows the river's path, tracing a route long used by pioneers. To the north, the small settlement of Pebble sits near the confluence of Pebble Creek and the river. For researchers, the map provides a look at modern land use, including the boundaries of the Caribou Co and Bannock Co line, alongside local landmarks like Robbers Roost and Crystal Springs.