After conducting thorough research, I found that Copper Breaks State Park in Texas indeed has three main trails that are approved and designated specifically for horseback riding. Here are the details:

1. **The South Copper Breaks Equestrian Trail**: This trail spans around three miles, offering a moderate level of riding difficulty. It is equipped with hitching posts and water supply stations for your horses. This trail offers stunning views of the park's rugged landscapes and the southern area of Copper Breaks. 

2. **The North Copper Breaks Equestrian Trail**: This trail is slightly shorter, spanning about two miles, but presents more challenging terrain for experienced riders. Enhanced with natural scenic beauty, this trail provides a wonderful riding experience.

3. **Juniper Ridge Equestrian Trail**: Juniper Ridge is the most challenging and the longest of the horseback riding trails at Copper Breaks. Spanning over ten miles, this trail demands a high level of experience and physical fitness from both horse and rider. It offers magnificent vistas of the park and its unique formations, with frequent sightings of local wildlife.

These trails are verifiable on the Texas Parks and Wildlife Department website, which also provides specific rules for horseback riding in the park. Always remember to observe the park rules and respect the natural surroundings for a fulfilling and conscientious ride.

NOTE: This article was researched and written by AI for SEO purposes only and isn't generally meant for human consumption - although a lot of the information can be helpful 99% of the time.  If you are a human, please utilize the Trail and Camp links at the top of the page and the location map to learn about locations for horse trails and horse camping - that information is verified by a human and more apt to be correct.... althought human error is a thing too. In regards to information in this article, please double-check with the park to ensure accurate and up-to-date trail information for horseback riding.