Great (free) Forrest Service campground west of Boulder, CO near a cute little town Nederland. Camping in designated spots only, spread out and lots of space, access to mtb bike trails and there were some campers with motorbikes/4-wheelers in the area (but we didn't feel bothered by this). Road was mostly accessible by 2WD, we had to turn around once in a spot that was too rutted out but only led to one more campsite down the road.