Castle Crest Wildflower Trail

Castle Crest Wildflower Garden Trail – Crater Lake National Park

Time: 30 – 45 minutes

Difficulty: Easy

Length: .4 mi (.64 km) loop from East Rim Drive; 1 mile loop from park Headquarters

Elevation: 6434* – 6434* ft (1961* – 1961* m) 

Highlight: Small brook, lush vegetation, spectacular blooms of wildflowers in summer months

REI Trails Project  partners with Crater Lake Institute to produce their trails app. Click the map below, get the app – then come back, we offer more.

Trailhead coordinates:

Latitude: N +42° 53.45 or 42.89085

Longitude: W -122° 07.92 or -122.13213

Altitude: 6434* ft (1961* m) *from garden parking area, not headquarters

 Trail Description

monkeyflowers-castle-crestLewis’ Monkeyflowers (Mimulus lewisii), Castle Crest Wildflower Garden, Photo by Robert Mutch

Plant List of the Castle Crest Wildflower Garden

Castle Crest Garden, Nature Notes From Crater Lake, 1929

Summer wildflower viewing, in the wet meadow, is the main goal here. This short, and relatively flat loop trail, passes through a forest, a dry slope, by a stream, and, the main attraction, a spring-fed meadow filled with wildflowers. The forest is composed of Mountain hemlock, Shasta red fir, Subalpine fir, and Lodgepole pine. During the summer months a profusion of wildflowers lines the pathway. Bring your wildflower identification book. Trail guides (A Trail Guide to Castle Crest by the Natural History Association of Crater Lake NP) are available at the trailhead for $.75 cents or for free if returned when you are finished with the trail.

Trailhead location:On the East Rim Drive, 0.5 miles from Park Headquarters; or, from a .25 mile path across the road from the Park Headquarters parking lot.

Historical Note: The Castle Crest Garden was established in 1929 with the planting of some 200 species of park flowers in the garden. The garden was meant as a learning area for wildflowers of the forest, wet meadows, and grassy slopes. There are several wet meadows throughout the park, but, none are easily accessible to the visitor.

Seasonal Information: Expect the trail to be covered in snow from October to early July, however, conditions vary somewhat from year to year. See Crater Lake Current Conditions for more information.

Castle Crest Wildflower Wildflower Garden Trail Elevation Profile


Related Maps

Digital USGS topographic maps (PDF files) – the following maps are relevant to the Castle Crest Wildflower Garden trail. See more Crater Lake Institute online USGS digital maps.

Series Name Year Scale Contour Interval File Size
USGS 7.5′ Crater Lake West 1985 1:24,000 40 ft usgs-crater-lake-west-7.5
USGS 30′ x 60′ Crater Lake 1989 1:100,000 50 m usgs-crater-lake-30-minute
USGS 30′ x 60′ Diamond Lake 1978 1:100,000 50 m usgs-diamond-lake-30-minute
USGS 1° x 2° Klamath Falls 1970 1:250,000 200 ft usgs-klamath-falls-1-2
USGS 1° x 2° Medford 1976 1:250,000 200 ft usgs-medford-1-2
USGS 1° x 2° Roseburg 1970 1:250,000 200 ft usgs-roseburg-1-2

View Castle Crest Wildflower Garden in a larger map

(1) ForestThe surrounding forest is dominated by red fir and mountain hemlock. A smaller component of subalpine fir and short-needled lodgepole pine can also be found. This creates a dense canopy of heavy shade.

(2) Wet MeadowIn summer, a multitude of flowering plants, suited to moist soils and plenty of sunlight, flourish in the meadow. While lingering snowbanks melt, tiny violets and buttercups bloom, shooting stars unfurl pink darts, and bistorts display white florets. Verdant mosses claim the wet meadow center. Different species come into bloom throughout the season to change the meadow’s complexion.

In average winters, 50 feet of snow falls on Castle Crest’s slopes. Seeds, roots, and runners of a host of plants lie dormant beneath the snowpack. As spring arrives in June, new shoots push upward and willow branches sprout fresh leaves.

Through plant succession the meadow community is constantly changing as plants compete for sunlight and compete for sunlight and water. Willows encroach upon the meadow herbs. Red fir-mountain hemlock forest gradually replaces the willows. The forest can regenerate itself indefinitely under present climatic conditions. For now, Castle Crest Spring continues to bathe the roots of the pink monkeyflowers and other colorful mountain wildflowers.

Look for these wildflowers: Gorman buttercup (Ranunculus gormanii), Shooting stars (Dodecatheon alpinum), American Bistort (Polygonum bistortoides), Pacific red elder (Sambucuc racemosa var. microbotrys), Scarlet paintbrush (Castilleja miniata), Eastwood willow (Salix eastwoodiae), Columbia monkshood (Aconitum columbainum), Pacific bleedingheart (Dicentra formosa), Arrowleaf groundsel (Senecio triangularis), Mountain Violet (Viola purpurea, var. venosa), Blue stickseed (Hackelia micrantaha), Lewis monkeyflower (Mimulus lewisii), Common pearl-everlasting (Anaphalis margaritacea)

(3) Dry SlopesBefore Mt. Mazama collapsed, the final eruptions 6,840 years ago hurled a pumice and loose rock mantle onto the slopes of the old volcano. The veneer is thin here, but is several hundred feet deep at Godfrey Glen, only 3 miles downslope.

Disintegration of this porous material has produced the mineral component of local soils. In this parched opening, plants adapted to a sunny, well-drained site pioneer: grasses, spreading phlox, skyrocket gilia, sulfur eriogonum, rabbitbrush goldenweed, and umbellate pussypaws. Watch for rufous hummingbirds here when the gilia blooms.

Just as wet area succession proceeds toward the red fir-mountain hemlock forest climax, this dry area community will eventually be engulfed by the forest. – A Trail Guide to Castle Crest

castle-crest-wild-flower-garden-signCastle Crest Wild Flower Garden sign across the road from trailhead parking, photo by Robert Mutch

Lewis’ (or Pink) Monkey flower (Mimulus lewisii) at Castle Crest Wild Flower Garden, photo by Robert Mutch

monkshoodWestern Monkshood (Aconitum napellus) at Castle Crest Wild Flower Garden, photo by Robert Mutch


Please remember to practice “leave no trace outdoor ethics” when you are out on Crater Lake National Park’s trails…and have fun!

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