Coal Seam Trail, Marshall Valley Trail and Spring Brook Loop South Trail
18.4 km
~4 hrs 10 min
299 m
"A wonderous hike from the heart of Boulder County"
The Coal Seam Trail, Marshall Valleyand Spring Brook Loop South Trail is a 18.4 km
looped trail that starts and ends in Eldorado Springs,
Boulder County, Colorado.
Based on our data, the trail is graded as Medium.
For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker.
Also, check our latest community posts for trail updates.
This trail can be completed in approx 5 hrs 37 mins. Caution is advised on trail
times as this depends on multiple variables. For more info read about how we calculate hike time.
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