this was an excellent hike. Easy to find thanks to all the reviews on here, first left past the 3 mile marker on highway 93 southbound. Since it has been so nice out the parking area was crowded so we parked on the side of the road exiting the area.
Wile walking under the interstate there are options for the Hot Springs or the Liberty Bell Arch. The Liberty Bell is to the left and there is somewhat of a trail, it becomes clear after you are on it for a bit. I also didn't see where to continue to the Arch from the ore car at first but after seeing people coming up the hill it became obvious.
The views are great seeing the different color rocks along the way to the Arch and the final scenic area where the Colorado can be seen below. Bring plenty of water and take your time, if an out of shape person like myself can make so will you!