Renee – you mentioned you’re looking into an Echo Lakes trip so I’ll focus my comments on that. I lived in the east part of Sacramento County for over 20 years and back packed a lot in Desolation Wilderness, using the Wrights Lake and Echo Lakes trail heads primarily, and mostly for 2 and 3 night trips. I stitched together a couple of these trips into a lollypop loop trail that might meet most of your criteria.
Beginning at Echo Lakes, follow the PCT north to Lake Aloha. Keep hiking north at the point where the PCT turns east, and head over Mosquito Pass and then down to the Rubicon Valley where you follow the Rubicon River to Camper Flat. From that point head east (with an elevation gain – sorry about that) to the Velma Lakes area where you connect up with the PCT. Follow the PCT south past lakes Fontanallis, then Gilmore. At Gilmore Lake, the PCT turns west, passing more lakes, and connects up with Lake Aloha. Take the lollypop stick part of the route south, back to Echo Lakes.
From the trail head, this route is about 33 miles. Taking the aforementioned boat that Flat Hat mentioned saves 2.5 miles each way, leaving you with a 28 mile hike, or there about. I used old math, my fingers, and a 1991 Tom Harrison map to get the total mileage. But I think I’m pretty close.
The Rubicon River at that time of year should be low but flowing most of the way, with pools deep enough to enjoy a cold soak. Look for China Flat along the river for a nice place to lunch, or camp. Mosquitoes should be non existent along the whole route by then, and in all my years hiking there, I never got rained on. I’d recommend taking a side trip from Lake Gilmore up to Mt. Tallac. It’s a bit of a climb, but provides great views of the Tahoe Basin. The chipmunk looking critters at the top of Tallac are golden mantled squirrels and they will steal food out of your hand even when you are looking. You’ve been warned.
A couple of considerations. Avoid traffic on I-5 and Hwy 50 Friday afternoon/evening, and again all day Sunday, if possible. And get to the trail head parking lot early, or you may need to park on the road into the ‘resort’. The crowds do thin out quite a bit a mile of so past the end of the second lake. Dan

