After conducting thorough online research, it has been confirmed that there are several trails in Montana De Oro State Park that allow horses. The information presented is verified as per the official sources.

1. Coon Creek Trail: This trail runs about 5 miles long starting from Spooner’s Cove. It passes through lush riparian canyons, offering unperturbed equestrian-friendly trails.

2. Hazard Peak Trail: Although this trail is predominantly known for biking, it permits horse riders as well. This 6-miles out-and-back trail offers panoramic views of Morro Bay and the surrounding area.

3. Reservoir Flats Trail: This shorter, 2-mile loop trail near Los Osos is best used from April until October and is also open for horse riding.

4. Bluff Trail: Horses are permitted on this scenic trail that stretches about 4.6 miles. It offers unparalleled views of the Pacific Ocean along the coastline of Montana De Oro.

5. Oats Peak Trail: This trail features a beautiful backdrop of wildflowers and is open to horses. The trail is about 10.5 miles long and best used from March until October.

6. Point Buchon Trail: This trail is horse-friendly but requires a permit. Check for permit availability and rules before planning your horseback riding trip.

7. Valencia Peak Trail: This challenging, steep 4.5 miles trail welcomes hikers, bikers, and horseback riders.

Please always check the local rules and regulations before riding as they can sometimes change based on park management’s discretion or due to environmental conditions.

Also, as with any trail, always respect the rules, stay on the trail, and clean up after your horse to help keep the trails beautiful and available for horse riding.

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.