All you have to do is read from_mars report "Cathedral Pass" and that is your answer.
Snow is not an issue I guess if you're a Cougar.
Expect to hike in the snow all the way from Sunrise Lakes to Clouds. A lot of it.
As for getting across Tenaya.... It's not super fast so it's not very dangerous.
Just butt cold. I've heard people saying to try the beach side... yeah... I dunno
about that... it's a moss pit east of the lake.
If you don't wanna get wet.... Trail Boat baby