The start of the rapid is marked by passing under the low railroad trestle. The trestle is basically unpassable at flows over around 3200 CFS.

Scouting this rapid from HWY 6 is technically illegal, as it is all private land on either side of the river. From the river, you can stop river right directly above the trestle, and walk up the short hill onto the trestle itself and have a look.