Just because people use and enjoy the outdoors doesn't make them liberals.
I’m a member of the Conservancy but I say right up front in my Rails to Trails profile that I believe the Sierra Club and some other “preservation” groups have a net negative effect upon the environment.
I regularly inline skate and skateboard land paddle on the Fall Line Trace in Columbus, Georgia which is across the river from my Alabama home. I also bicycle on other rail trails.