The Sac-AREDN group has the first area high level node in operation.  The node is located on Carpenter Peak which is at Highway 50 and the Sacramento/El Dorado county line.  Ther are 2.4 GHZ, 3.4 GHz, and 5.9 GHz radios with 120 sector antennas pointed at downtown Sacramento.  Look for radio specifics on the Node Information page.  The 2.4 and 5.9 nodes are for end users and the 3.4 will be for backbone links.