Finally, hiking time is here again, and Colorado River Trail in Grand County, Colorado is a great place to go. Outdoors people generally like this part of Colorado. Summertime brings highs in the 70's to Colorado River Trail, and through the night it cools down to the 40's. Daytime highs through the winter are in the 20's, and night lows throughout the winter for Colorado River Trail tend to be in the 0's. Colorado River Trail is a location that is quite dry generally. The month with most of the rain is August, and the driest of the months is February.