The Hot Spring:
Just like Paulina Lake Hot Springs the water comes out on the shore of East Lake, near the water line. The hot spring is located on the western side of East Lake just across the Inter Lake Flow from the Paulina Lake Hot Springs. This hot spring water is probably associated with Paulina Lake if not from the same general source.
There are many spots to dig for hot water along the edge of the water. You will know because of a high sulfur smell and you can see the bubbles of hot water all along the western shore of the lake right around water level. Several holes are dug along the shore where people dug to find the hot water. If not wanting to dig, a small walk around two points and you will find a wood box on the waters edge with scalding hot water running towards it from the beach. The water emerging from sand varies from 125 to about 140 degrees F, and mixes with the lake water quickly. The temp of the tub all depends on the lake level so a little work might be in order to soak if the water level is high, that's where a bucket and shovel comes in handy. East Lake is popular with fishers and boaters so most likely someone will be watching you from the water.