Rob,

It seems like that trail going SE over to the Cache Meadow trail is not going to be as easy to find as this one was.  Maybe it's because the Three Lynx trail has had regular use in the not-so-distant past for maintenance purposes as Donovan said.  Perhaps the connecting trail was not useful in that way and therefore was not traveled much nor maintained for decades.  But it'll be worth another look next time.

That viewpoint above Serene Lake is always worth a stop.  No matter how many times I've been there, I can't help but take another photo.