Horseback Rides

Diamond P Ranch

May 20th - September 30th

Thousands of visitors, a 70 year family legacy, and countless wildlife encounters–moose, wolves, golden eagles, elk and the magnificent grizzly.

Thank you to all our guests over the years from around the world. We loved every minute of it!

-Rex Portmann

Welcoming Lisa & Willie

The new operators of our guided horseback rides.

In 2023, the Diamond P Ranch sold its horse guided tour business to Lisa and Willie of Mountain High Horses, LLC. The forest service permits that have provided our guests exclusive access to the Gallatin National Forest in this area for the past 70 years, are connected to this ranch location and will continue to serve our valued guests for generations to come.

Frequently Asked Questions

  • The Portmann family still owns and operates the Diamond P Ranch, with Rex Portmann as the head of ranch.

  • When we sold the horse guiding business, we selected new operators that were committed to carrying on the legacy and traditions of Ocile Portmann: safety, horse welfare, and nature conservation.

  • There are typically over one-hundred horses at the ranch during the summer. The horses we used for horse guided tours were sold to Mountain High Horses, LLC. However, the Portmann family still owns a herd of horses that live on the ranch in the summer.

  • For any comments or concerns about your guided horse tour, please ask for Lisa in the office, owner of Mountain High Horses, LLC. For any other comments about the ranch, please ask for Rex Portmann.

West Yellowstone is under attack and we need your help to save it from developers!

It’s guests like you that help us preserve Yellowstone’s ecosystem and rich history, which is a part of the Diamond P Ranch.

Sign up and join us in the fight to protect Yellowstone’s beautiful and historic decent into the park.