Nowadays, you hike in from the north past Gotham City along a trail above the river. Don't rap in from up top as this has caused several near-fatal accidents in the past decade or so. Start from the highway at the big pullout on the west side with the green sign. Follow a trail across talus downslope of the highway into a narrow bedrock canyon until you come out by Gotham City. Cross the sandy talus to the base of Star Chek.
Finally, don't drink the river water as Whistler's semi-treated sewage is pumped in at the dam a few km upstream.