The one park we didn’t make it to on our adventure last summer was Yosemite (well ok we still have to visit the Channel Islands and then we are really done!). The original travel plan included Yosemite as a stop for many reasons- it is relatively close, the Sierra Club history, and it was the inspiration for all the National Parks. Zack and I also managed to get through about 1/2 of the Ken Burns documentary – and most of what I remember between falling asleep was about Yosemite and Muir. Our inability to get a campsite (any campsite) that summer and the unfriendly doggy atmosphere made us eliminate it from our itinerary. Long story- but we have been planning this trip to Yosemite since we got back last year.
Our experience with Yosemite really started in January when the campsite reservations opened up online. There we sat with laptops ready, 1st, 2nd and 3rd choices all picked out for the 9:00am start. At 9:01 the service was overloaded, at 9:10 everything in the valley was booked- at 9:15 someone released a site outside of the valley in Hogdon Meadows, and we booked it for the long weekend.
We left San Diego after work on thursday and Zack amazingly drove us all the way to Mammoth Lakes by 1:00am. Sadly there are no mammoths there but the town was pretty cute, right in between Sequoia NP and Death Valley NP, and looks like it would be great for a winter get-away. There is also reportedly a super cool ghost town north of the town. We stayed overnight at a ski lodge and headed out early the next morning. It was cold, but we didn’t really pay attention to the hotel staff when they told us they were expecting a snow storm. 
The Mono Lake Tufa State Natural Reserve is just north of Mammoth Lakes on the way to the Yosemite entrance. Mono Lake is one of those classic examples of California water miss-management. It is an ancient (over 1 million yr.old) lake with no outlet that serves as a huge stop0over for migratory birds and the nesting ground for about 80% of all California Gulls. The birds eat the millions of brine shrimp in the lake- which you can actually see in the water. Of course the birds are super buoyant in the high salinity water so they bob awesomely when they are eating.
In the 1940s they started draining the lake for water supply for growing populations in LA- the water in the lake halved and the salinity doubled causing all sorts of ecological problems. In the 1970′s they began a plan to bring the water levels back up to an acceptable level. Another interesting conservation story in this area of California.

What is a Tufa? A tufa is a fabulous name for a geological feature made of limestone and formed when underwater springs rich in calcium mix with the lake water that is rich in carbonates. The calcium carbonate precipitates (remember this from chemistry?) around the spring, and over the course of decades, a tufa tower will grow. Here is some more tufa geology.

Do you see those storm clouds over the mountains?