Undine Falls is one of many easily accessible waterfalls in Yellowstone National Park and located up in the northern section of the park about 4 miles east of the Mammoth Hot Springs area of Yellowstone. When you are driving from Mammoth Hot Springs toward the Tower-Roosevelt section of the park, the pull-off for Undine Falls is on the left side of the road. The parking lot is small and the falls can be seen right from the parking lot.
To get a better view of the falls it is best to get out of the car and at least walk up to the guard rail so as to get a more unobstructed view of the falls. The area between the parking lot and Undine Falls is a big cliff, however it is possible to walk down a little way past the guard rail for even better views. Undine Falls consists of a total drop of about 60 feet in three plunges. The Yellowstone Lava Creek feeds Undine Falls.
One of the best times of year to view Undine Falls is in the fall when the leaves are turning (typically mid September into October). In order to get the best pictures of Undine Falls that include some of the brightly colored leaves it is often necessary to walk past the guardrail and a little bit closer to the edge of the cliff. If you are with children be sure to keep an eye on them and keep them back from the step cliff that is just beyond the guard rail.
Other waterfalls near Undine Falls in the northern section of Yellowstone include Wraith Falls (which requires a 1 mile round trip hike to view) and Rustic Falls a few miles south of the Mammoth Hot Springs area of the park right at the top of the pass that goes around the Golden Gate of Yellowstone.