Tom Zimmer of Upland, California, prepares his 1910 Buick Model 17 at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. Zimmer and a group of horseless carriage enthusiasts, organized by Cam Sidwell, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

A 1910 Buick Model 17 owned by Tom Zimmer waits at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. A group of horseless carriage enthusiasts, organized by Cam Sidwell, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Tom Zimmer of Upland, California, prepares his 1910 Buick Model 17 at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. Zimmer and a group of horseless carriage enthusiasts, organized by Cam Sidwell, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Lance Hultgren of Orange County, California, prepares his 1919 Rolls Royce while it was waiting at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. Hultgren and a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

From left, Alan Clendenen of Newport Beach, California, and Bill Ottemann of Fall Brook, California, work to prep Ottemann's 1909 Rambler as Ted Bowers of Huntington Beach, California, works on his 1911 Pope Hartford car at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. The group of horseless carriage enthusiasts, organized by Cam Sidwell, embarked on a 10-day adventure from Morgan to Yellowstone National Park in the pre-1920s era automobiles.

Cam Sidwell, driving a 1913 Pierce Arrow horseless carriage, leads a group of others driving similar vehicles as they depart Morgan, bound for Yellowstone National Park on Friday, June 2, 2023.

A sparkling and recognizable hood emblem sits atop a 1914 Rolls Royce, owned by Alan Clendenen of Newport Beach, California, at the Cobblestone Hotel & Suites in Morgan on Friday, June 2, 2023. A group of about 13 of horseless carriages and their enthusiastic owners, organized by Cam Sidwell, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Cam Sidwell, flanked by his 1913 Pierce Arrow horseless carriage, offers route instruction and some brief comments to a group of others driving similar vehicles prior to their departure from Morgan, on their way to Yellowstone National Park on Friday, June 2, 2023.

The tail light and license plate of a horseless carriage is shown as it makes its way out of Morgan, bound for Yellowstone National Park on Friday, June 2, 2023.

Ted Bowers of Huntington Beach, California, drives his 1911 Pope Hartford car into Mountain Green on the way to Yellowstone National Park on Friday, June 2, 2023. Bowers is part of a group of about 13 horseless carriage enthusiasts, organized by Cam Sidwell, of Morgan, as they make the 10-day trek.

Cam Sidwell, driving a 1913 Pierce Arrow horseless carriage, leads a group of others driving similar vehicles as they depart Morgan, bound for Yellowstone National Park on Friday, June 2, 2023.

Lance Hultgren of Orange County, California, pilots his 1919 Rolls Royce past Snowbasin Resort and Mount Ogden over Trappers Loop on Friday, June 2, 2023. Hultgren and a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Alan Clendenen of Newport Beach, California, navigates his 1914 Rolls Royce past Snowbasin Resort and Mount Ogden over Trappers Loop on Friday, June 2, 2023. Clendenen and a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Cam Sidwell, driving a 1913 Pierce Arrow horseless carriage, leads a group of others driving similar vehicles as they make their way past Snowbasin Resort over Trappers Loop, bound for Yellowstone National Park on Friday, June 2, 2023.

Gary Hunter of Arcadia, California, passes The Oaks Restaurant while driving his 1910 Pope Hartford horseless carriage down Ogden Canyon on Friday, June 2, 2023. Hunter and a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Allan Schmidt passes The Oaks Restaurant while driving his 1910 Pierce Arrow horseless carriage down Ogden Canyon on Friday, June 2, 2023. Schmidt is joined by a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, while they make their way from Morgan to Yellowstone National Park on a 10-day adventure.

Tom Zimmer of Upland, California, passes the waterfall at the mouth of Ogden Canyon while driving his 1910 Buick Model 17 on Friday, June 2, 2023. Zimmer and a group of horseless carriage enthusiasts, organized by Cam Sidwell, are making their way from Morgan to Yellowstone National Park on a 10-day adventure.

Bob Knaak of Orange, California, passes the waterfall at the mouth of Ogden Canyon while driving his 1911 Marmon on Friday, June 2, 2023. Knaak is joined by a group of horseless carriage enthusiasts, organized by Cam Sidwell of Morgan, while they make their way from Morgan to Yellowstone National Park on a 10-day adventure.