Grade on US 89
What is the steepest grade and for how long on US 89 from Gardiner,MT to Mammoth Hot Springs.
Forum Discussion
Believe it or not, you can go to Google Street View and do a virtual drive all the way down the grade from Mammoth Hot Springs to Gardiner. Shortly after passing the campground entrance, there is a grade sign that says "7% grade - 2 miles".
