If you are going to ride an ATV, UTV, dirt bike, or dual-sport bike off-road (trails) Colorado does require that you register your vehicle. Even if your dual-sport bike is plated you are still required to register with Colorado to ride the trails. The cost to register is $25.25, annually.
It does take about two months for them to mail your OHV stickers to you, so apply early. If your stickers do not arrive by the rally, keep a copy of your application with you. Also, contact the Colorado State Parks - Registration Unit to receive updates on your registration. The phone number in Colorado is (303) 791-1920.
For more information and to register your vehicle, click the links below.
OHV Regulation Information