Wild West Cowboy Riding Giant Golden Retriever

A rugged weather-beaten 40s cowboy with a dusty stubble jaw, squinting eyes, and an earnest heroic demeanor, wearing a battered brown leather cowboy hat, faded denim jacket, bandana around the neck, and leather chaps, stoically riding atop a gigantic loyal Golden Retriever dog the size of a draft horse, galloping majestically through a dusty Wild West desert canyon with towering red rock mesas and saguaro cactuses in the background, dog's fluffy golden fur blowing triumphantly in the desert wind with an adorable happy dog expression with tongue lolling out, kicked-up dust clouds swirling around giant paws, backlit by brilliant low golden hour sunset light creating long warm shadows and glowing golden rim light on the dog's fur, cinematic epic adventure framing with low wide-angle perspective, shot on 35mm anamorphic cinema lens at f/2.8, rich warm desert color grading, Kodak Portra 400 film feel, heroic yet hilarious concept, 8K ultra-detailed rendering.