Miller Fork, Signal Mountain, and Donner Pass Loop Trail is a 17.8 mile moderately trafficked loop trail located near Glen Haven, Colorado that features beautiful wild flowers and is rated as moderate. The trail is primarily used for hiking, walking, nature trips, and birding and is accessible from March until October. Dogs are also able to use this trail.
I would recommend just hiking Miller Fork Trail on it's own as it becomes easy to lose the trail around mile 4 and trail is nonexistent around mile 4.5. A different Trailhead may be an option for the Signal Mt. summit. Although I have nothing but great vibes about the trail I chose