Mount Vaca is the highest point in the Vaca Mountains, Napa and Solano counties of Northern California. The site is in the eastern most of the Inner Coast Ranges in north−central California Coast Ranges. The flying site is a mountain thermal, XC site, and is recommended for advanced pilots.

Mount Diablo offers an excellent variety of soaring experiences to the advanced pilot. Pilots regularly soar Diablo’s shear rocky peaks, rolling hills and ridges, gnarly canyons and grassy pastures; sometimes all in the same flight. As a site open only to USHPA advanced rated Hang Glider and Paraglider pilots, good flying skills and judgement are the keys to rewarding flights at Mount Diablo.