A few good sunrise locations in Rocky Mountain National Park are: Moraine Park, Sprague Lake, Dream Lake, Gore Range; good sunset locations are Rock Cut, the trail to Dream Lake. Note that Dream Lake and Emerald Lake are backlit at late afternoon. So, in general, they are not ideal locations for sunset.
Laurent Martres' book "Photographing the Southwest" provides excellent descriptions of Rocky Mountain National Park. I highly recommend it.
Sunrise at Sprague Lake
Alpines at Sheep Lakes area
Fall Colors | The photo was taken at Alluvial Fan area.
Longs Peak | The photo was taken about half hour before sunset on the trail to Dream Lake.
Sunrise at Moraine Park
Elks
One head with two bodies :)
Elk Horn
Male Elk
Sunset at Rock Cut
Last Light on Longs Peak | The photo was taken at Rock Cut.
Moon and Reflections at Sprague Lake