It's impossible to say what the situation might be over a week from now. Currently you cannot drive from SF to Mammoth via 120 or 108 but you can get there via 4, 88 or 50.
Many thanks for your reply
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There's a way to do this, and it's not too complicated. Some of the drive will be very pretty (let me say that you should probably post on the Mammoth and June Lakes forums for things to do while there - you need to get to hikes that are at higher altitude to really enjoy the area - although Mono Lake, of course, is a must-see - and Bodie would be a very interesting place, as well. Soak up the "True West" environment and maybe watch some classic Westerns before you go (you will get a kind of Wyoming vibe from it).
So, I would go to Jamestown and Sonora (maybe...even stay in SonoRa? **not** Sonoma). And then over the 108 toward Bridgeport (via the southern direction of the 395 - the 108, like the Tioga Road, runs to the 395). Bridgeport is a great little town. Then south to Mammoth (from whence you can see Yosemite's High Country - arguably the best part of the park).
We just drove it last week, no problems - not fire effected.
Hi Janette F,
Unfortunately since you visited last week, the fire has spread and due to thick smoke and the need to stage emergency equipment, Hwy. 120 closed and there is now only one entrance open to Yosemite—that is from the east, via Tioga Pass, and you cannot get west of White Wolf toward Yosemite Valley.
In addition, Hwy. 108 is closed at Kennedy Meadows due to another wildfire.
There is a third wildfire that just started near Hwy. 4 near Angels Camp, but thus far no road closures.
The OP's best bet for now is either to take Hwy. 88 to Hwy. 89 through Markleeville (Alpine Co.) to Hwy. 395 south, or just take Hwy. 50 toward Tahoe and swing south on 395 from there.
Definitely keep up with the fire news. The roads that are currently closed could be open by the 14th, and the currently open roads could be closed.
If your route and itinerary allows, I highly recommend a stop at the Manzanar National Historic Site. It is the site of an internment camp for Japanese citizens during WWII. We had to leave Yosemite via headed because of road closures and this, as well as Mono Lake, were amazing places we would have missed. While it meant an extraordinarily long driving day to get from Tuolumne Meadows to the edge of Sequoia National Park, we are so grateful to have seen these places not in our original plan.