You are looking for a Bison Tube. Should be a fairly easy
find.
PLEASE NOTE: I have noticed increased traffic on this road as of late -USE CAUTION.
This is one of my favorite roads in southern Alberta. For the next 4 miles as you travel this road north of here, you will wind, climb and curve your way through the countryside. Use extreme caution as you drive this road as there are many blind curves as well as blind hill tops. Watch out for deer, coyotes, and porcupine. I have even seen elk along here hopping fences.