Coalton Trailhead
Coalton Trailhead

Coalton Trailhead

Enjoy rolling hills, open plains vistas, and grasslands habitats.


  • Coalton Trail
    2.9 miles – Easy
    Hiking Allowed Dogs Allowed Bikes Allowed E-bikes Allowed Horses Allowed
  • Mayhoffer Singletree Trail
    2.7 miles – Easy
    Hiking Allowed Dogs Allowed Bikes Allowed E-bikes Allowed Horses Allowed
  • Meadowlark Trail
    2.7 miles – Easy
    Hiking Allowed Dogs Allowed Bikes Allowed E-bikes Allowed Horses Allowed

Trails Connections

Rules & Regulations

Bikes On Designated Trails Only
Pets On Leash
No Drones
No Hunting/Firearms
No Camping

All Parks & Open Space Rules & Regulations

Trailhead Amenities

27 car parking spots
2 ADA parking spots
Restroom near trailhead
20 person group shelter located near trailhead
3 horse trailer parking spots
Live view of Coalton Trailhead
Live view of the Coalton Trailhead Parking Lot. More images below.

See All Park Photos

Keep in Mind

  • Pedestrians, bicyclists, equestrians, and leashed dogs are allowed on the trails.
  • The trails travel through active agricultural land and off-trail access is not permitted.
  • Livestock may be present along trails and can be aggressive. Please move slowly and allow livestock to move off the trail.
  • Additional parking is available at the Oerman-Roche Trailhead, 1.5 miles north of the Coalton Trailhead on McCaslin Blvd.
  • Regional trails and regional trail connectors are open to commuters 24 hours per day. Trailheads close at sunset and parking is not allowed between sunset and sunrise.

In the rain shadow of the Rocky Mountains, the Great Plains are dry, windy and expansive. Receiving small amounts of precipitation, the land is dominated by grasses. The scarcity of water prevents larger shrubs and trees from growing. However, the soils are rich thus allowing a wealth of smaller plants to thrive. These plants, in turn, support a variety of animal species. Temperatures on the plains fluctuate enormously from very cold winters to hot summers. Nevertheless unique plant and animal adaptations have allowed life to prosper in plains ecosystems.


  • Black-tailed prairie dog
  • Bobcat
  • Coyote
  • Deer mouse
  • Little brown bat
  • Mule deer
  • Nuttall’s cottontail
  • Raccoon
  • Red fox


  • American crow
  • American kestrel
  • American robin
  • Barn swallow
  • Black-billed magpie
  • Chipping sparrow
  • Common raven
  • Common grackle
  • Eastern kingbird
  • Mourning dove
  • Red-tailed hawk
  • Red-winged blackbird
  • Rock dove
  • Song sparrow
  • Turkey vulture
  • Western kingbird
  • Western Meadowlark

Amphibians & Reptiles

  • Bullsnake
  • Prairie rattlesnake
  • Short-horned lizard
  • Chorus frog
  • Northern leopard frog


  • American bumblebee
  • Blister beetle
  • Boxelder bug
  • Carolina grasshopper
  • Clouded sulphur butterfly
  • Colorado soldier beetle
  • Darkling beetle
  • Gray hairstreak butterfly
  • Green-striped grasshopper
  • Hunt’s bumblebee
  • Painted lady butterfly
  • Plains lubber grasshopper
  • Skipper butterfly species
  • Speckle-winged rangeland grasshopper
  • Twelve-spotted skimmer dragonfly


  • Boxelder
  • Chokecherry
  • Coyote willow
  • Sand cherry
  • Wild plum
  • Wild rose


  • Boxelder
  • Chokecherry
  • Coyote willow
  • Sand cherry
  • Wild plum
  • Wild rose

White/light pink wildflowers

  • Deathcamas (Toxicoscordion sp)
  • Downy paintbrush (Castilleja sessiliflora)
  • Drummond’s milkvetch (Astragalus drummondii)
  • Great plains yucca (Yucca glauca)
  • Ground-plum (Astragalus crassicarpus)
  • Narrow leaf puccoon (Lithospermum incisum)
  • Prickly poppy (Argemone polyanthemos)
  • Sand lily (Leucocrinum montanum)
  • Scarlet beeblossom (Oenothera suffrutescens)
  • Snow-on-the-mountain (Euphorbia marginata)
  • Textile onion (Allium textile)
  • Wedgeleaf frogfruit (Phyla cuneifolia)
  • Western false gromwell (Lithospermum occidentale)

Yellow/green wildflowers

  • Blanketflower (Gaillardia aristata)
  • Buffalo-bur (Solanum rostratum)
  • Coneflower (Ratibida sp)
  • Cowpen daisy (Verbesina encelioides)
  • Curlycup gumweed (Grendelia squarrosa)
  • Evening primrose species (Oenothera sp)
  • Goldenrod (Solidago sp)
  • Hairy false goldenaster (Heterotheca villosa)
  • Leafy wildparsley (Musineon divaricatum)
  • Narrowleaf puccoon (Lithospermum incisum)
  • Nuttall’s violet (Viola nuttallii)
  • Plains coreopsis (Coreopsis tinctoria)
  • Prairie false dandelion (Nothocalais cuspidata)
  • Prickly pear cactus (Opuntia sp)
  • Wild sunflower (Helianthus annuus)

Blue/Purple/magenta wildflowers

  • American vetch (Vicia americana)
  • Blue flax (Linum lewisii)
  • Britton’s skullcap (Scutellaria brittoni)
  • Dakota mock vervain (Glandularia bipinnatifida)
  • Dotted gayfeather (Liatris punctata)
  • Early purple milkvetch (Astragalus shortianus)
  • Locoweed (Oxytropis sericea and O. lambertii)
  • Narrow leaf penstemon (Penstemon angustifolius)
  • Pleated gentian (Gentiana affinis)
  • Prairie bluebells (Mertensia lanceolata)
  • Purple prairie clover (Dalea purpurea)
  • Rocky mountain beeplant (Cleome serrulata)
  • Sidebells penstemon (Penstemon secundiflorus)

Red wildflowers

  • Scarlet globemallow (Sphaeralcea coccinea)

This loop, formed by Boulder County and City of Boulder trails, is the former route of the Morgul-Bismarck Loop of the Coors International Bicycle Classic from the 1980s and is commonly referred to as the Dirty Bismark Loop.

Contact Us

Parks & Open Space

8 a.m. to 4:30 p.m.

Office Location

5201 St. Vrain Road
Longmont, CO 80503
Map and Directions
Office Hours: 8 a.m. to 4:30 p.m.
Friday by phone, email, or appointment only.

Parks are open sunrise to sunset