Colorado's trailer towing

Colorado Trailer Towing Laws: What You Need to Know Before Hitting the Mountains


If you’re planning to tow a trailer through the scenic roads of Colorado, understanding the state’s trailer towing laws is essential. Colorado’s regulations ensure safe towing practices, helping both locals and visitors enjoy their travels without encountering legal issues. Here’s a rundown of Colorado’s trailer towing laws and what you need to know before you hit the road.

1. Maximum Towing Speed Limit

Colorado has a maximum towing speed limit of 55 mph on most highways. This is lower than the standard 65-75 mph speed limits in many areas, and it’s essential to stay within this limit when towing to avoid accidents and citations.

2. Trailer Weight Restrictions

The weight of the trailer is a key factor in determining if it can be safely towed. In Colorado:

  • Trailers weighing over 3,000 pounds must have working brakes.
  • Trailers below this weight can be towed without brakes, but it’s still recommended to use them for added safety.
  • Make sure to check your vehicle’s towing capacity, as exceeding it can lead to hefty fines and dangerous situations on the road.

3. Lighting and Reflectors

Colorado law mandates specific lighting for trailers to ensure visibility. Trailers must have:

  • Taillightsbrake lights, and turn signals that are visible from the rear and sides.
  • If the trailer or its load blocks the vehicle’s license plate or rear lights, the trailer must be equipped with its own license plate light and rear lights.
  • Reflectors are required on both sides of the trailer to increase visibility during low-light conditions.

4. Safety Chains and Couplings

Colorado requires all trailers to be connected to the towing vehicle with a safety chain or cable in addition to the primary hitch or coupling. This acts as a secondary connection, ensuring the trailer remains attached even if the hitch fails. Safety chains should be crossed under the hitch and should be strong enough to support the trailer’s weight.

5. Breakaway Systems

Trailers in Colorado that weigh over 3,000 pounds are required to have a breakaway system. This system engages the trailer’s brakes if it becomes disconnected from the towing vehicle, helping to prevent accidents. Check your breakaway battery regularly to ensure it’s functioning properly.

6. Width, Height, and Length Limits

To prevent issues on narrow or winding roads, Colorado has strict size limits:

  • Width: The maximum width allowed for a trailer is 8.5 feet (102 inches).
  • Height: The maximum height limit is 13 feet, 6 inches.
  • Length:
    • The combined length of the towing vehicle and trailer cannot exceed 70 feet.
    • If you’re towing two trailers in tandem (also called double towing), Colorado law requires an anti-sway device on the first trailer. Additionally, the total length of the combination must still stay within the 70-foot limit.

7. Triple Towing

Colorado permits double towing (one vehicle towing two trailers), but it does not permit triple towing (towing more than two trailers) on its roads. Ensure your trailer combination complies with this rule to avoid fines.

8. Passenger and Cargo Safety

Colorado law prohibits passengers from riding in a trailer while it’s being towed, a rule meant to protect both drivers and passengers. For cargo, make sure everything is properly secured to prevent shifting during transit, especially if you’re towing items like boats or ATVs.

9. Towing Permits

However, while Colorado doesn’t generally require a permit for standard towing, oversized or overweight trailers may need a special permit from the Colorado Department of Transportation (CDOT). If your trailer exceeds the standard length, width, height, or weight limits, you’ll need to apply for a permit before traveling.

10. Trailer Insurance

Although Colorado doesn’t require insurance specifically for trailers, you should still strongly consider having coverage. Trailer insurance covers damages or liability in case of an accident, theft, or damage to your trailer and its contents. Talk to your insurance provider about options tailored to your specific trailer type and needs.

Final Thoughts


Ultimately, Colorado’s trailer towing laws aim to promote safe driving for everyone on the road. By following these regulations, you can ensure a smooth and lawful towing experience. From speed limits and size restrictions to lighting requirements and safety chains, understanding and adhering to Colorado’s trailer towing laws will help make your journey through the Centennial State safer and more enjoyable.


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