Miller Rock

4.3/5 (16 reviews)
Allenspark, Colorado (Boulder County)
Last Updated: 09/06/2022

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Highlight: Miller Rock
Located in the Arapahoe National Forest, west of the town of Lyons, Miller Rock is a moderately trafficked, out-and-back trail that will lead you to the Miller Rock rock formation, the South St. Vrain Creek, and the remains of an old sawmill site. The three branches of this trail system offer users different options from a moderate drive through the thick forest to some great camping and hiking locations, the ability to test your rig's flex and capability over rock and washout obstacles, and also the option of fording a creek or taking a dip in the cold creek waters. This trail system is entirely landlocked by private property on all sides. Thus it is an out and back trail system. Please note, there is no parking for trailers or unlicensed vehicles at the start of this trail.
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