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Floydjer has posted the well known and often published photo of Theodore Tetzlaff (aka Terrible Teddy) in his Maxwell taken at the conclusion of the speed trials in 1914. His passenger, while not positively identified, is thought to be Salt Lake City Mayor Samuel Park. A number of state and local dignitaries ventured out to the salt to see the trials, among them Utah Governor William Spry.
Truth be told, I'm sure there was no toking going on, but Tetzlaff was known as a heavy drinker and was a morphine addict to boot at the time of the speed trials. He used the drug for pain and headaches he suffered from an accident in 1910. He may have been very relaxed when he went 142.85 mph through the mile course.
Bob.