Talking about the Shoshone section near Glenwood (I think 'Pinball' is the first rapid)? If so, yes.
You have to be traveling east bound on I-70 to exit and then you can only return westbound. Coming from the east, exit at the Grizzly exit (takeout for Shoshone or putin for Grizzly) and get back on the highway the other way.
It's a fairly small area under the highway that can get very congested.