Where is this hidden valley?

Map published in ad in S.F. Weekly, October 15, 2001	Gateway site and the wildlife corridor. More about this map and the greenbelt on the second page of images. Location: view from Tilden Park, southeast into Gateway Valley See the second page of images fora detailed photo caption.
This small map links to a larger map showing open space along the northern border of Contra Costa and Alameda counties. Gateway is sketched in red. (The upper boundaries are accurate, the lower portion appears to be approximate). Green indicates regional and other park lands; yellow indicates watershed lands and other protected open space with restricted access. Other privately owned open space tracts are not shown, since they too are unprotected. The Montanera Development tract also shows up on maps maintained by various groups. While the "Greenbelt Alliance" has seemingly given up on opposing this developement you will see it on their interactive East Bay map as a splotch of color just above the word "Oakland." While not labeled, the shape of the land is distinctive.	Just where is Gateway Valley? Gateway Valley extends roughly from Round Top peak in Sibley Volcanic Regional Preserve down to Brookside Drive (which crosses Moraga Way in Orinda). The Montanera LLC property (which is larger than the Valley, overlapping into other watersheds) borders on Highway 24 at the Gateway Blvd. exit, and then following around clockwise it borders on EBMUD land, private homes in Orinda from Brookside Drive to Edgewood Drive, PG&E land by the Moraga Substation, the former McCosker Ranch in Indian Valley (part of which is the proposed Indian Valley mitigation area in the Public Notice) and on the Upper San Leandro Creek canyon, Huckleberry Botanic and Sibley Volcanic regional preserves, and more EBMUD land leading back to highway 24. (It doesn't touch Pinehurst Rd, though the former McCosker Ranch, now owned by Indian Valley LLC which is affiliated with Montanera, does.) The valley is well hidden. You can drive to the edge of the property at the end of Edgewood Drive in Orinda. Or you can drive to the entrance to Sibley preserve on Skyline Blvd. in the Oakland hills and hike out past Round Top to look down into the valley from above. Many people have suggested we point it out with interactive maps. Yahoo Maps (by Mapquest) has the typical difficulty in showing this secret valley. The Montanera project is mostly unmarked yellow space. It lies below the circled "24," right of "Fish Ranch Rd" and "Snake Rd," above "Huckleberry BRP," and left of "Glorietta." (The Yahoo map also fails to correctly identify Pinehurst Rd. the road running from "Huckleberry" down to the intersection with Canyon Road, and it puts Canyon in the wrong place, on Skyline Blvd. in Oakland instead of in the middle of that stretch of Pinehurst Rd. )
Map from the Public Notice The map above was created by the permit applicant. There are also more detailed subdivision and specialized maps in the public notice.

    PICTURES AND MAPS, page one | page two | page three | page four (location and assorted maps)