This card shows an Autumn scene in the Rockies, where the foreground trees are deciduous and changing colors, while the background ones are evergreens. There are commonly differing tree combinations on the slopes of mountains, since various tree species are adapted to different altitudes and climates.

The description states simply:
1220  WHEN AUTUMN PAINTS THE TREES AND HILLS IN MAGIC COLORS
–It is also probable that the person coloring this image decided not to add more colors to the background trees. This card likely dates to the 1940s.

This is a different kind of herding, as it focusses on horses instead of cattle.

The description states:
A152 — WILD HORSE HERD
Rounding up wild horses required excellent horsemanship, dexterity at roping and infinite patience.
–The image seems a bit more docile and less dramatic than the post card description. These horses are already pretty much under control, as the two cowboys in the foreground have established a rope cordon around the herd as seen by the thin yellow line across the image.
These horses are commonly called wild, but they are better described as feral horses, having descended from domesticated horses abandoned by the Spanish in the 16th and 17th century. Those living on public land are protected now under federal law.
This postcard likely dates to the 1950s.

This image shows a cowboy posing before a significant herd of cattle, with more likely out of the frame on either side. Such herds are still common, though often dispersed much of the year during grazing season.

The description states:
A217 – WHITE FACED HEREFORDS
Cattle in the Western sense of the word, under the watchful eye of the ranch hand. Great hearts such as these need vast areas on which to graze. Photograph, Western Ways by R. J. M.
–Just behind the horses head is a windpump and a water tank, providing a clear reason why the cattle would be located here, close to water. This postcard likely dates from the 1950s.

This image starts a series of views featuring the American West and the cowboys that work the cattle ranches throughout the area.

The description states:
A190 – A working cowboy riding the range.
–This working cowboy appears to be guiding some cattle to water with the help of another cowboy in the lower center near the lake shore. While there are no clear time indicators, this card likely dates to the 1950s.

This is an oddly framed photo of the famous Hanging Rock feature over the Gorge. Viewing the central portion of the picture does not reveal the rock among the landscape.

The rock is all the way at the top, not completely seen, while the photo emphasizes the Gorge instead. The description states:
HANGING ROCK IN THE ROYAL GORGE
The Royal Gorge is one hundred and twenty miles from Denver and forty-five miles from Colorado Springs, and may be reached by D. & R. G. R. R. from either place. The bed of the famous canyon is 5,494 feet above sea level. Its walls of rugged granite tower 2,700 feet above the Arkansas River, which flows at its base.
–The railroad referenced in the description above is the Denver and Rio Grande Railroad, now a part of the Amtrak system. The card likely dates from the late 1940’s.
 

This is a colorized postcard from an originally black and white photo of Royal Gorge, Colorado. Regrettably, it is not currently in such pristine condition as a result of the 2012 Royal Gorge Fire. It burned for seven days, damaged the bridge, destroyed the aerial tram and many buildings. The park is closed for the entire 2013 season for reconstruction and repairs.

The description on the back reads:
LOOKING DOWN INTO THE ROYAL GORGE.
The Royal Gorge, the mother of the Arkansas River, is a giant slit or canal in the Rocky Mountains, cut from the summits of the lofty peaks to the very foundation stones. A span wide in places and rising 3,000 feet perpendicular to the clouds, it presents miles of scenery equaled in few places on the globe.
— The postcard is unused and undated, but is consistent with other cards of the late 1940’s.