Picket Wire Canyon Dinosaur Tracksite

On my trip west this year I made sure I had time to visit this unique area. The Dinosaur Tracks are located within and along side the Purgatoire River with the Comanche National Grassland. [Gallery]

source:usgs.gov (click to enlarge)

The area is located 35 miles south of La Junta, CO off the lightly maintained County Road 25 (upper left in the map above). The last few miles are on a primitive forest service road that ends at the Withers Canyon Trailhead and Campground (four sites with fire grates and a pit toilet).

Withers Canyon Trailhead

The first portion of the 5.2 mile trail goes down a steep “stairway” to the canyon floor. I had to walk my bike most of the way but it’s not far. After that it flattens out into an easy path through grassland and cottonwood trees along the Purgatoire River.

There are a few ups and downs where the river crowds the canyon side.

About half-way to the tracks I came upon the Dolores Mission from the 1870s to 1890s.

The small cemetery includes several well preserved headstones (mostly of children).

After another easy 1.5 mile cycle I was at the tracksite proper. There is a parking area for off-road vehicles and a pit toilet. There are several interpretive signs.

Someone obviously had a sense of humor…

The tracks are on both banks and in the river bed itself. The water was low so I was able to access most of the site however dirt, sand, mud, and debris covered a portion.

Three-Toed Theropod (Carnivore) Tracks
Two Parallel Sauropod (Herbivore) Trackways

To give a sense of how complex the site is I’ve borrowed part of this illustration from an excellent write-up I found online. [A Dash with the Dinosaurs Field Trip Guidebook (October 2000) compiled by Matthew Morgan for the Colorado Geologcial Survey]

source:cgs (click to enlarge)

There are more of my track photos in the gallery.

I was alone for the entire day but I did encounter a few critters along the way.

Collared Lizard
Tarantula

My cycle back was idyllic! Speeding along with the warm sun at my back and a cool breeze on my face.

Did I mention the “stairway” back up to the trailhead?

I hadn’t expected there to be designated campsites at the trailhead, but I decided to stay instead of driving back to civilization in the dark. It was a nice, quiet and beautiful night!