Umpqua Hot Springs is well worth the trip off the main drag near Bend, Oregon. Multiple pools sit on top of a steep cliff overlooking the freezing river below.
If the road is open to the final parking lot (sometimes not in the middle of winter), it is just a short (albeit) steep hike to the pools.
A steep decent (with help from some ropes) brings you down to the river where there is a very interesting hot cave with another pool for soaking.
