Rivermark Condo 2/2 1148 sq.ft. Honestly, you might not see this again for another decade. A penthouse above the Guadalupe Trail — 18-ft ceilings, zero obstructions, and Mt. Diablo sitting right there in your sightline like it was built just for you. That view never gets old. This is the kind of unit people hold onto. And when it does come up? It goes. The location is unmatched in the community, the views are the best in the building, and the peaceful trail below makes it feel a world away from everything.