The Rim trail starts out in a grass prairie that runs alongside one of the smaller canyons. The Trail itself is primarily a two track road at the point and fairly easy to hike. There are spectracular views of the Holmes Creek Canyon as the trail winds its way along the rim of the canyon. Look closely as the Bison seem to like this area especially on the nothern end of the prairie just before it descends down into the canyon. After about 1.5 miles the trail cuts down into the canyon. Where it gradually continues down towards the little red river. At about 3 miles total the trail intersects the wild horse trail. I went past this point slightly to the river before turning around and hiking back out the other way.The trip in was fairily easy but the trip back out was fairly strenous especially the last climb back up to the prairie flats. I really like hiking in Caprock Canyons. Its not real crowded and the geological formations of the canyons is very beautiful.