 Turning northwest, they again crossed the divide and began traveling down the Firehole River into the geyser basins.They followed the Firehole River then Madison River out of the region, exiting the current park boundary near what is now the town of West Yellowstone, Montana on October 3, 1869.They followed the Madison down through Madison Canyon, emerging into familiar territory of the lower Madison River and mountains to the west around Virginia City, Montana.