Ed
We have done the crossing of the Sierras now for the past three years with the So Cal MINI Maniacs. Been on all five passes. Here is how I see it.
1. Tioga Pass, Hwy 120 you can drive down the 49 and up into Yosemite Park then over the Sierras on 120. It will be less crowded after Labor Day especially going east, but a long drive. Going over 120 is slow, speed limit 25 for a good part of the way. Scenery spectacular. End up in Mammoth Lakes for the night. Ralphie is the honorary mayor of Mammot and knows watering holes if you know what I mean. Long way back to Napa. Easy way back for So Cal GT Owners. Down Hwy 396 300 miles to West LA.
2. Sonora Pass, closer down Hwy 49, up through Twain Harte, rather mundane 1st half west to east. Some very high slow twisty roads in the middle, no mountain lakes to see, ends up on 395. a drive to Mammoth South, and Lake Topaz north. Leaves you truly in the middle of nowhere.
3. Hwy 4, Ebbets pass. Great start in Murphys California (nice overnighter with a great western town and wineries), more scenic than Sonora pass, couple of spectacular lakes, very high twisty roads, also ends on Hwy 395 long drive to anywhere.
4. Hwy 88-89, south on Hwy 49 to Jackson, through Sutter's Creek, not so great 1st part going up the Sierras. Lots of construction, traffic, motorcycles, on top is the Kit Carson Resort, Kirkwood Resort, you can then take the turn-off to South Lake Tahoe. Hit South Lake Tahoe or the Nevada side. This is not bad, you can then exit out Lake Tahoe through Truckee, and back on I-80 west to Napa, Sonoma and SF.
5. Take I-80 east from Napa, exit Truckee, through Squaw Valley, to North Shore Incline Village. Hyatt Regency is an excellent hotel and casino. Lone Eagle Restaurant on Lake Tahoe. superb. Next day to Inspiration point, back around west Lake Tahoe to Truckee back out to I-80 and then to Napa, or South Lake Tahoe to Placerville on Hwy 50.
6. Last route is I-80 > 50 > Placerville > 89 into S. Lake Tahoe. Not a bad choice, shorter Sierra viewing than the ones above.
Just some observations from AtomicGT
Some of the So Cal Brothers, can take 89 out of South Lake Tahoe to Hwy 395, Eastern Sierra Scenic Byway, 180 miles to Bishop, then 260 miles to Los Angeles. Could be a nice way back for the So Cal GT Bros. Hwy 395 along the eastern Sierra is spectacular, no other road like it!
Remember SteveA is an Idahoan, now!