Buckeye. Sometimes I call him as “Grey” without really thinking because he reminds me so much of his (likely) great-grandsire Grey.
(The thing behind him is the back of a marker used by Colorado Parks and Wildlife in their grid patterns to count elk and deer from the air. There are at least a few of them in Spring Creek Basin that I’m aware of. And I’m not sure whether CPW actually still uses them; they’re from the days when it was Colorado Division of Wildlife. Buckeye was getting some good use out of it as a face, poll, ear, jaw and neck scratcher, then as a butt scratcher before I took this pic. :))
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Happy autumn equinox! The days already are getting noticeably shorter, and I am sooooo happy for autumn to arrive after a very long, very hot, very dry summer!
Spring Creek Basin Mustangs 
I’m grateful for autumn too, TJ, my favorite season. But I hate what comes after. Winter. Don’t like the cold, don’t like the dark, and don’t like the lack of green things and flowers. Hope we have a long autumn! And dear Buckeye, didn’t know his family line is Traveler! Cool.