One of the ways getting to Source Lake is to take the Snow Lake Trail. Not sure if there’s a hiker’s path to the lake at the last big switchback leading up to the ridge to Snow Lake, but that’s where one can begin their short scramble down to the lake.
Met two lovely French ladies by the parking lot who were in need of a place to snowshoe, so I took them on an easy scramble. The lake was largely covered in snow and I couldn’t tell how big it really was. We saw some people on the other side of the basin snowshoeing while taking photos by the lake. So instead of going back the way we came from, we made a loop to the other side of the basin then back to the parking lot.