Rocky Mountain National Park, Colorado, USA

Recommended accommodation near Rocky Mountain National Park...

Wildflower species of the Rocky Mountains...

Elephant's Head flowering in the Rocky Mountains National Park
Elephant's Head (Pedicularis groenlandica) flowering in Rocky Mountain National Park

Of the three National Parks we have visited in the Rocky Mountains - Yellowstone National Park, Grand Teton National Park and Rocky Mountain National Park - the latter is by far the most floristically rich. It does, of course, still have all the other spectacular wildlife features and magnificent scenery that we have come to expect from the Rocky Mountains area, but if your main interest is in wildflowers, Rocky Mountain National Park offers fabulous wildflower meadows and the best chance to see some of the really rare species including the Calypso Orchid, Calypso bulbosa.

The Rocky Mountains are the defining feature of Colorado, Idaho, Montana and Wyoming, and they form part of the massive range of mountains now referred to as the Continental Divide. Once called 'Backbone of the World' by the Native Americans, long before any of us knew what The World really meant, and covering an area of nearly 450 square miles, these massive rocky peaks, forests, lush mountain meadows, rivers, streams and deserts certainly deserve the backbone epithet: they are as vital to the survival of the numerous wildlife species that live there as our spines are to us.

Hooded Lady's-tresses
Spiranthes romanzoffiana in a wet meadow

Designated as a National Park in 1915, Rocky Mountain National Park has trails and roads ascending to more than 12,000 feet above sea level. The mountain scenery is breathtaking, both looking up from the valleys and also looking down from the top of the Alpine Ridge Trail.

Long before the area became a National Park it was inhabited by the animals that still make it famous, and also by people: there is evidence of human occupation going back at least 10,000 years. It was not until well after the first 'European American' settlers arrived to farm and make their livelihoods that interest in conserving the area for its nature and wildlife took hold.

In the early 1900s, a desire by certain sections of society to conserve the area was communicated to Congress. The main parties involved in this initiative were local chambers of commerce, conservationists, women's clubs, Enos Mills Colorado Mountain Club, and R. B. Marshall of the U.S. Geological Survey. There was, however, considerable opposition from others who thought that the measures that would be introduced in the interest of wildlife conservation would have an adverse affect upon their lives and their ability to earn money. The Front Range Settlers League of Estes Park, ranchers, cattlemen, and even miners all objected strenuously, but it was the conservationists who got their way in the end.

Access to Rocky Mountain National Park

Entry passes to Rocky Mountain National Park can be obtained on a daily, weekly or annual basis. An automobile pass costs US 20 dollars and lasts for a week; pedestrian and bike access is 10 dollars, and an annual pass is 40 dollars (all these are 2013 prices). If you are planning to visit several national parks during your stay, an annual pass for all of the American National Parks is 80 dollars (again, this was the 2013 price).

A Yellow-bellied Marmot photographed high up in the Rocky Mountain National Park

Road access to the Park is excellent. If you are not travelling in by car each day, regular shuttle buses run from Estes Park carry visitors between the various Information Centres and the numerous Trail Heads within the park. Visitor Centres are located throughout the park to help you to get the most out of each of the areas; they are staffed by enthusiastic and knowledgable Rangers, who can tell you the best places for seeing wildlife or for enjoying your chosen activity.

Flora and Fauna of Rocky Mountain National Park

A visit to this area is an opportunity for anybody interested in the natural world to experience life in some of the most beautiful and dramatic scenery to be found anywhere in America. For those with a special interest in geology the area is a paradise, bearing testament it does to the numerous fault lines that caused the earth's crust to move up and down, creating the landscape we see there today. The effects of glaciation and the subsequent retreat of the ice around 10,000 years ago caused the scouring out of massive basins. Some of these have become lakes from which rivers flow either east towards the Atlantic Ocean or west to the Pacific Ocean.

Lilium philadelphicum, Wood Lily or Rocky Mountain Lily
Rocky Mountain Lily (Lilium philadelphicum) flowering by the Big Thompson River

The ideal time to see most of the wildflowers in the Park is from mid-June to mid-July, but even as late as August the wildflowers will still be blooming at higher altitudes. Several species of Indian Paintbrush occur in the Rocky Mountains, but the rarest of them, Sulphur Paintbrush Castilleja sulphurea) is found high up in the Alpine region along with Moss Campion Silene acaulis, Alpine Sunflower Hymenoxys grandiflora, and Purple Fringe Phacelia sericea to name but a few.

Lower down, and particularly in the riverside meadows, there are various wild Penstemons (Penstemon sp.), Western Monkshood Aconitum columbianum, numerous asters, and two really special treats - Rocky Mountain Fringed Gentian Gentianopsis thermalis, and Shooting Star Dodecatheon pulchellum.

Driving up high into the mountains to the Alpine Ridge Visitor Centre, for instance, particularly if you use the Old Fall Road (a one way dirt track) rather than the main blacktop road, is an excellent route for seeing some of the other special plants such as Roseroot Rhodiola rhodantha and Common Alp Lily Lloydia serotina. Common Alp Lily is known as Snowdon Lily in the UK and is now extremely rare, surviving in only a few remote locations in the Snowdonia mountains in Wales.

The river valleys and areas surrounding the lakes, where there is a higher level of moisture throughout the summer, are also excellent. It was in these damp meadows that we found the orchids mentioned below along with other lovely and iconic wildflowers of the region: Elephant's Head Pedicularis groenlandica, more common on the western side of the Park, where it grows in vast colonies in damp meadows, and two of the beautiful gentians of the area, Parry's Gentian Gentiana parryi and Rocky Mountain Fringed Gentian Gentianopsis thermalis.

Corallorhiza maculata - Spotted Coralroot Orchid
Spotted Coralroot Orchid - Corallorhiza maculata grows high up on one of the mountain trails in Rocky Mountain National Park

If you are interested in wild orchids there are lovely colonies of Hooded Ladies'-tresses Spiranthes romanzoffiana. Known in the UK (where it is an endangered species) as Irish Lady's-tresses, this plant is interesting for reasons other than rarity alone: it is found in parts of Ireland and Scotland but is not present at all on mainland Europe. The jury is still out on how the same species can appear on continents which have the Atlantic Ocean separating them.

The White Bog Orchid (also called Rein Orchid) Platanthera (formerly Habenaria or Limnorchis) dilatata var. albiflora also grows on the flood plains of the various rivers throughout the Park, but it blooms earlier than Hooded Ladies-tresses Spiranthes romanzoffiana. Other orchids in the Park include the Green Bog Orchid Platanthera obtusata, Early Coralroot Orchid Corallorhiza trifida, Spotted Coralroot Orchid Corallorhiza maculata, Western Coralroot Orchid Corallorhiza mertensiana, Western Heart-leaved Twayblade Listera (now Neottia) cordata var. nephrophylla, as well as the much sought-after Calypso Orchid Calypso bulbosa, for which the common name in America is Pink Fairy Slipper Orchid.

As well as being home to such wonderful plantlife, Rocky Mountain National Park is also a paradise for birdwatchers - and indeed for anyone with a general interest in wildlife and wild animals. During our walks we were lucky enough to encounter Marmots at very close quarters and to see and photograph Mule Deer, Elk, Moose and some of the many species of Chipmunks that live in the park.

Wild Turkeys are often spotted wandering about in gardens in the towns around the national park along with the delightful hummingbirds that seem to be particularly fond of house verandas, patios and decks.

Calypso bulbosa in typical habitat
Calypso bulbosa in typical woodland habitat - picture Diane Kassab
Closeup picture of Calypso bulbosa
A closeup of the beautiful flower of this rare orchid, whose future is threatened everywhere that it occurs - picture Jim Sneary.

Top of page...

Wildflowers in the Rocky Mountains States - Colorado, Montana, Wyoming

Scientific name

English name

Botanical Family

Anticlea elegans Elegant Death Camas/Mountain Death Camas Liliaceae
Aquilegia coerulea Colorado Blue Columbine Ranunculaceae
Aquilegia elegantula Western Red Columbine Ranunculaceae
Aquilegia flavescens Yellow Columbine Ranunculaceae
Argemone polyanthemos Prickly Poppy Papaveraceae
Asclepias speciosa Showy Milkweed Asclepiadaceae
Balsamorhiza sagittata Arrowleaf Balsamroot Asteraceae
Camassia quamash Common Blue Camas Liliaceae
Corallohriza maculata var. occidentalis f. immaculata Western Spotted Coralroot Orchid f. immaculata Orchidaceae
Corallorhiza maculata var. occidentalis f. intermedia Western Spotted Coralroot Orchid f. intermedia Orchidaceae
Corallorhiza trifida Early Coralroot Orchid Orchidaceae
Corallorhiza mertensiana Western Coralroot Orchid Orchidaceae
Dodecatheon pulchellum Shooting Star Primulaceae
Frasera speciosa Green Gentian/Elk Weed/Monument Plant Gentianaceae
Gaillardia aristata Blanket Flower Asteraceae
Gentiana parryi Parry's Gentian Gentianaceae
Gentianopsis thermalis Rocky Mountain Fringed Gentian Gentianaceae
Lilium philadelphicum Rocky Mountain/Wood Lily Liliaceae
Listera (Neottia) cordata var. cordata Lesser Twayblade Orchidaceae
Listera cordata var. nephrophylla Western Heart-flowered Twayblade Orchidaceae
Lithophragma parviflorum Woodlandstar Saxifragaceae
Minuartia obtusiloba Alpine Sandwort Caryopyllaceae
Pedicularis groenlandica Elephant Head Orobanchaceae
Pedicularis parryi Parry's Lousewort Orobanchaceae
Penstemon whippleanus Whipple's Penstemon Scrophulariaceae
Phacelia sericea Purple Fringe Hydrophyllaceae
Platanthera dilatata var. albiflora Rein Orchid/White Bog Orchis Orchidaceae
Platanthera dilitata var. leucostachys Bog Candles/Sierra Rein Orchis Orchidaceae
Platanthera huronensis Green Bog Orchis Orchidaceae
Platanthera hyperborea Northern Rein Orchis Orchidaceae
Platanthera obtusata Blunt-leaved Bog Orchis Orchidaceae
Ratibida columnifera Coneflower Asteraceae
Rhodiola rhodantha Queen's Crown Crassulaceae
Rholdiola rosea King's Crown Crassulaceae
Silene acaulis Moss Campion Caryophyllaceae
Spiranthes romanzoffiana Hooded Ladies-tresses/Irish Lady's-tresses Orchidaceae
Toxicoscordion venenosus Meadow Death Camas Liliaceae
Trollius laxus Globeflower Ranunculaceae
Yucca glauca Soapweed Yucca/Spanish Bayonet Agavaceae

© 1995 - 2024 First Nature: a not-for-profit volunteer-run resource

Please help to keep this free resource online...

Terms of use - Privacy policy - Disable cookies - Links policy