vintage trike racing

Here is a picture from 1972 or 3. The trikes raced the same courses as the amphibs, but bypassed the deep mud holes. Those guys were fearless, and amazingly fast. I loaded this pic onto a 6x6 site and now can't find the original, so here's a copy of the one from there. I hope that's okay- the original pictures are mine. The El Burro at the campground is my own, the Tricarts and Tricubs belong to family and friends. If I remember rightly, the two race machines were Dunecycles, but you folks may correct me on that. If I can find my original scans, I'll post more.