Spectacular I - 70 as it winds its way along the Colorado River - just north of Glenwood Springs, Colorado.  I have pulled off on an exit ramp.  Note Amtrak tracks to left of river, northbound thruway at lower right and elevated  southbound thruway hugging the mountain on far right.  Just below the railing in the middle is a paved recreational  trail that follows the river for over 10 miles.