Needles Highway Tunnel/Custer State Park

With mirrors in looks like you might have about 7" per side clearance. Don't burp and you might make it. :-)

Really?? Everything I've read says there are a couple tunnels that are pretty tight. One being 8''4", and another being 9'. I had pretty much written it off for our trip to Custer this summer because of this. I too drive a Ram dually.


Edit.... Looks like I got beat on the widths by a couple minutes :)

Highway 16A Tunnel Clearances and other Info

Tunnel 5 (Near Needle's Eye), 8' 4" wide by 12' 0" high; Tunnel 6, 9' 0" wide by 12' 3" high.

Beautiful area. We camp at Custer SP every year in the Fall.

you will fit through just fine. no need to pull in the mirrors. In fact, its wise to leave them out to gauge the room for the dually fenders.

It will be tight. You will need to fold your mirrors in

Retractable mirrors?
Yes!