
Mile 18.2 Trailhead. Cottonwood Wash lies between here and the mountains (view south). |
Overview
This is a delightfully easy, 1.2-mile hike up a wash in a canyon that runs through a
beautiful, geologically jumbled area. The route ends at Cottonwood
Spring, but the easy walking continues up the canyon for another mile
or so. The canyon runs up through volcanic mountains, red sandstone
crags, layered carbonate mountains, conglomerate cliffs where blue-gray
limestone cobbles are set in a matrix of red sandstone, plus mudstones
and siltstones that record ancient lake beds with myriad Cenozoic
fossils and ripple marks. The colors in the mudstones and siltstones
include grays, tans, reds, yellows, and greens, plus the area has lots
of glittery gypsum mixed in. This is a great route for less adventuresome people and families.
Link to map. |

Cottonwood Wash (view south). |
Watch Out
Other than the standard warnings about hiking in the
desert, ...except for crossing the highway, this route is about as safe
as they get. There is a low and easy-to-climb pour-over behind the
spring, but always be careful when you are high enough to fall and hurt
yourself. Always be aware of the potential for flashfloods.
When you get into the red and white mud hills, you may see two species of rare plants
(Silverleaf
Sunray and California
Bearpaw Poppies) that are species of concern in Nevada.
Please help protect these plants by staying off the mud hills.
While hiking, please respect the land and the other people out there, and try to
Leave No Trace of your passage. Also, even thought this hike is short, be sure to bring what
you need of the 10 Essentials. |

Cottonwood Wash. The red bluff on the left side of this photo is the one at the end of the yellow line in the above photo (view southeast). |
Getting to the Trailhead
This hike is located along Northshore Road in Lake Mead National Recreation Area, about 1 hour northeast of Las Vegas.
From town, drive out to Lake Mead.
From the intersection of Northshore Road and Lakeshore Road (Table 1, Site 654), drive north on Northshore Road for
18.2 miles to a pullout on the north side of the road (0.2 miles east
of Mile Marker 18) (Site 804). The pullout is on a bend in the road with limited
visibility in both directions, so be careful pulling in and turning
around. Park here; this is the trailhead. |

Halfway Narrows. Lots of fossils and ripple marks in the east (left) wall (view southeast). |
The Hike
From the trailhead (Table 2, Waypoint 1), a use-trail runs
south from the western end of the parking area. Carefully cross the
highway and walk south on the well-marked use-trail across some nice
desert pavement and scattered, stunted creosote bush and white bursage.
After about 0.2 almost-level miles, the use-trail reaches the edge of
Cottonwood Wash. From here, you can look northwest to see Northshore
Road crossing the wash, and you can look southeast and up the canyon. |

Oyster and snail fossils at Half-way Narrows. |
Drop into the wash (Wpt. 2), which is fairly broad, smooth, and runs at a gentle grade. Turn south and walk
upstream. There is more water available to plants in the wash than on the previous desert flats, and
species like catclaw acacia, mistletoe, Mormon tea, desert holly, and desert almond become more common, although you can still
see drought-tolerant species like creosote, bursage, and pygmy cedar beyond the wash. When you get deeper into the red and white
mud hills, you will even see some rare species like silverleaf
sunray and California
bearpaw poppies, which are species of concern in Nevada.
Please help protect these species by staying off the mud hills. |

Notch with ripple marks. |
About halfway to Cottonwood Spring (0.6 miles out), the trail passes
through some narrows (referred to here as the Halfway Narrows) that
were formed by tilted layers of volcanic ash that turned to stone (Wpt.
3). Just below the narrows (less than 50 yards), there is a low, fairly
smooth, yellowish-brown wall on the east (left) side of the wash that
is full of recent fossils. We found lots of oyster or mussel shells,
snail shells, worm tracks, and other things that we couldn't identify.
At about the middle of this wall, a little wash comes down the hillside
and cuts a notch in the wall. Up in the notch, maybe 20 feet from the
bottom of the wash, there are some of the best examples of "fossilized"
ripple marks (large, deep, and regular) that I have ever seen. Above
the narrows, we also found many worm tracks in the stone. |

First view of Cottonwood Spring. As seen here, the wash generally is flat, broad, firm, and easy to walk on (view southeast). |
At the narrows, there is a southwest-facing wall this some nice specimens of
barrel cactus,
pygmy cedar, Mormon tea, and mesquite growing on sunny side. It is hard
to believe that these plants can grow on this sunny rock face, but it
makes for a very pretty rock garden. On the north end of this wall,
about 10-15 feet above the wash, there is a set of ripple marks that
are larger (wide but shallow) than any I have ever seen. They are so
wide (perhaps 18-24 inches) that they don't look like ripple marks
until you see the difference between the surface of that layer of stone and the one that lies above it.
Continuing up the wash for another 0.2 miles (Wpt. 4), which
is still running at the same gentle angle, you get your first view of
the cottonwood trees at the spring. From there, it still is another 0.2
miles to the spring. Just below the spring, there is a fork in the
wash. The route goes up the eastern (left) fork, which is obvious
because you can see the cottonwood trees. |

Cottonwood Spring (view southeast). |
Wander on up to the spring (Wpt. 5), which is marked by two
cottonwood trees against a cliff that is red on the west side (right)
and blue-gray conglomerate on the east side (left). There is one small
palm tree here, lots of honey mesquite,
arrowweed, and saltbush, plus several desert willows. The ground must often be moist here because there is a
lot of salt built up on the surface of the soil. If there is no water
on the surface, look around to see if animals dug into the sand to find water.
After resting and enjoying the shade of the cottonwood trees, either wander farther up
the wash, which is an easy walk for another mile or so (Wpt. 6), or
follow your footprints back to the trailhead. Above
Cottonwood Spring, the canyon continues to run through the same
colorful volcanic landscape as was below the spring. For details of the
canyon above Cottonwood spring, see the Hamblin Mountain route. |
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