Talking about the Shoshone section near Glenwood (I think 'Pinball' is one of the first rapids above 'The Wall')? 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.
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover." - Mark Twain