Rabbit Mountain - Near Lyons

This easy to get to trail is great for a quick day ride and I found can be pretty accessible year round.  It is right off of Hwy 66 on the East side of Lyons before hwy 36.
The parking lot has back in spots for 3 trailers, during the week this isn't a problem, but they fill up quick on the weekends.  
This trail is pretty popular and even on the weekdays we frequently encounter lots of other hikers with dogs and bikers.  I like this trail for spicy horses that are new to trail work as it starts off with a longer hill that you can blow your horse out on pretty much from the get go and get them to think a little harder by the time you reach the top.  
I love seeing all the wildlife here, I don't think I have ever gone without seeing at least a deer or two, and during the summer you can pretty much count on seeing snakes (some that rattle). I like to have a shod or booted horse on this trail as it can be pretty rocky in areas.  
There are 3 trails to take here, the Eagle Wind trail, which is the Eastern most trail, makes a nice almost 4 mile loop and is my preferred route.  There are no water crossings on this trail, a great clean bathroom at the trailhead along with a spigot for water, and cell service can be spotty.  
Overall - Beginner friendly - nice quick ride close to town.  
Bring with you - the usual items; water, snacks, jacket, hoofpick and bug spray in the summer.
Things to know - It can get busy on the evenings and weekends, I have heard you can park a trailer down the road past the parking lot, but I have never done this personally.  

​https://bouldercounty.gov/open-space/parks-and-trails/ron-stewart-preserve-rabbit-mountain/