A friend emailed me this link, so I checked it out. Tunnel Meadow is about 14 miles due south of Mt Whitney, and about 5 miles southwest of Trail Peak, an easy hike from Horseshoe Meadows.

Here's the map -- switch to Satellite mode, and you can see the strip!
Gmap4 embedded version (Same map, separate window)



Here's the web page with a write-up (from Abandoned & Little-Known Airfields: California, Tulare County ):
    Tunnel Meadows Airport, Tunnel Meadows, CA

Posting the text and pictures below...