Below is the Air Force Flight Test Center(AFFTC) Low Level Terrain Following Test areas....the places you will see alsorts of exotic aircraft flying....
On this page i will show you with the help of Edwards AFB Documents where to see the action and test flying of aircraft such as the F-22 Raptor on flight tests and Global Hawk UAV tests etc.

Above you can see the layout of Edwards AFB at the bottom left hand corner(S/West).  The Edwards AFB Restricted area is marked with a black line orbiting the base and local area.  Above you can see also areas of Terrain Following High Speed Flight and also a Supersonic Corridor.
To see these areas...you have to go to the following:

From Highway 58 on the four corners junction(Kramar Junction) drive north. The road you are now on(H395) goes to Bishop and up through China Lake....this road will be the most profitable in Aircraft sightings. It takes you through the Low Altitude high speed corridor and also on the right is the supersonic corridor of which you will see aircraft doing the runs.

10.3.1. There are 7 single-leg TFRs approved for test use only. Route width is centerline navigation
These are:
10.3.1.1. Haystack Range, 34º48’N 118º03’W to 34º52’N 117º33’W (supersonic tests permitted).
10.3.1.2. Desert Butte, 35º05.05’N 117º01’W to 35º05.0’N 117º56’W (underlies Cords Road Test Area).
10.3.1.3. Harper, 35º10’N 117º53’W to 35º01’N 117°16’W.
10.3.1.4. Saltdale, 35º19’N 117º47’W to 35º03’N 117º01’W.
10.3.1.5. Black Mountain, 35º11’N 117º02’W to 35º11’N 117º25’W (supersonic tests permitted).
10.3.1.6. Rough One, 35º15’N 118º08’W to 35º55’N 118º08’W.
10.3.1.7. Rough Two, 35º44’N 118º00’W to 35º55’N 117º59’W.
10.3.2. A terrain following area, Eureka Valley, is bounded by: 37º12’N 117º50’W to 37º12’N 117º42’W to
37º02’N 117º35’W to 36º59’N 117º42’W.