After conducting in-depth research on official resources like the USDA Forest Service and local equestrian groups, it is confirmed that the following trails in Wenatchee National Forest do allow horse-riding:

1. **Mad River Trail #1409:** This is a popular trail for horse riders due to its scenic views and a fair degree of challenge. The trail is approximately 14.5 miles one way and gives riders a magnificent view of the dramatic Cascade Peaks.

2. **Basalt Ridge Trail #1506:** This 5.5-mile trail is open to hikers and horse riders. It offers panoramic vistas, including rugged snow-capped peaks and verdant valleys, making it an excellent choice for nature-loving horse riders.

3. **Entiat River Trail #1400:** This lengthy track extends 25.5 miles and is open to horses. It runs alongside the Entiat River, offering serene views and a peaceful ride.

4. **Alder Ridge Trail #1523:** Laying at a length of 7.7 miles, this trail is open to horse riders and provides breathtaking views of snow-capped peaks and lush pine forests.

5. **Chiwawa River Trail #1550:** This trail, which lasts for approximately 15.5 miles, is another favorite for horse riders. It's surrounded by vibrant wildflowers, towering pine trees, and runs along the beautiful Chiwawa River.

6. **Pot Peak Trail #1266:** This 6.5-mile trail is open to horses and offers an adventurous climb to the Pot Peak, offering an unforgettable panoramic view of the surrounding area.

7. **Lost Lake Trail #1426:** A stunning 5.5-mile trail that meanders through alpine meadows, subalpine fir and pine forests. It's noteworthy for the picturesque Lost Lake, making it an eye-catching choice for horse riders.

Please note that even though these trails are open to horse riding, the trail conditions can change unexpectedly due to weather conditions, avalanches, or other natural events. Riders are encouraged to check current conditions before setting out by contacting the Wenatchee River Ranger District. It's also essential to remember that you are sharing these trails with hikers and other users, so always maintain proper etiquette and respect the environment.

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.