Local:

Great Plains Bike Club – http://greatplainsbikeclub.org
Bike UNL – https://bike.unl.edu
Lincoln Bike Kitchen – https://www.facebook.com/lincolnbikekitchen

Regional:

Nebraska Cycling Association – http://www.nebraskacycling.org
Omaha Bikes – http://bikeomaha.blogspot.com
Great Plains Trail Network – http://www.gptn.org
Nebraska Trails Council – https://www.nebraskatrailsfoundation.org
Trails Have Our Respect – https://www.thortrails.org/
Kansas Cyclist – http://www.kansascyclist.com/news

National:

League of American Bicyclists – http://www.bikeleague.org/index.php