Metolius Springs is located about 45 minutes Northwest of Bend toward Three Fingered Jack. The source of the cold springs is unknown; however, the theory is that the Black Butte drainage basin is 300 ft above the the springs which allows water to flow under Black Butte to the Metolius. According to Wikipedia, the springs were created about 1 1/2 million years ago and water flows at about 50k gal/minute. The Metolius was one of the coldest bodies of water I’ve jumped in, next to the water in Oneonta Gorge (the coldest I’ve ever been in).
The hiking trail follows the river closely and offers so many beautiful views.