Standing out very dramatically on Google Maps (Satellite photo tab) in
the region immediately N of Freeway 80 between Donner Lake and Truckee
is a long, nearly straight-line feature that looks like an abandoned
railroad or freeway right of way (or creek bed?) running almost exactly
E to W, starting near Pioneer Trail and Euer Valley Rd E of Truckee and
extending across Northwood Blvd and along Ski Slope Way, ending above
about the midpoint of Donner Lake.

Anyone know what this really is?