Along the Colorado front range, there has been sporadic mesh activity over the years using the Linksys WRTs. Most of the current known RF activity has shifted to using the Ubiquiti products on 13 cm, utilizing channels -1 and -2 at 5 MHz bandwidth and using the default AREDN SSID. So, if you live along the front range of Colorado, and want to setup a mesh node, then you might want to set your Ubiquiti node accordingly.
There is an active RF-only group operating in the Boulder area. There is a node at NCAR (National Center for Atmospheric Research) that provides nice coverage for those in the Boulder to Longmont area. It is currently on channel -2 at 5 MHz bandwidth and uses the default AREDN SSID. Most of the participating nodes have MeshChat and HamChat installed, so you can connect and leave messages.
There is some activity in the Douglas and Elbert County area, south of Denver. Most folks have been connected using the tunneling feature, as there isn't currently a mesh node located at a high location for folks to connect to via RF. I currently have a node in Castle Rock on channel -2 at 5 MHz bandwidth, using the AREDN SSID, and it is tied into the tunnel, as well. It is on a Yagi at the moment, aimed northwest, but if anyone in the Castle Rock or Parker area wants to try a connection, I can move the antenna in their direction.
Since we have some challenging terrain in Colorado for microwave signals, we are always looking for more nodes to get on the air. The more nodes there are, the better the chance that we have of covering a larger geographic area and getting to folks who are situated in more challenging areas.
Castle Rock, CO