There are two ways to get to the Beaver Creej Trailhead. I've driven both and am still not sure which way is fastest. Here they are:
Poudre Canyon: From downtown Ft. Collins go north on U.S. 287 to mile marker 22. Turn west on Hwy. 14 going up Poudre Canyon. Stay on Hwy. 14 to mile marker 96 which is the turnoff for Pingree Park (CR-63E). Turn south across the bridge and drive on a gravel road for about 15 miles until you see the sign for Tom Bennett Campground on the right side of the road.
Pennock Pass: From Ft. Collins, take Harmony west. After you pass Taft Hill, Harmony becomes CR-38E. Take CR-38E past Horsetooth Mountain Park to Masonville. Continue through Masonville and go about 10 miles until you see the sign for Pennock Pass (this is CR-44H). Take CR-44H approximately 15 miles over the top of the pass and down the other side until you run into CR-63E. Turn left on CR-63E and continue up this road until you see the sign for Tom Bennett Campground on the right side of the road. Pennock Pass may be closed in the winter so contact Canyon Lakes Ranger District to make sure it's open if you want to use it during the winter.
This is probably as far as you can drive in winter. In the other three seasons continue another mile or so down the road Sky Ranch Lutheran Church Camp. The official trailhead is right before you enter Sky Ranch on your right. However, if you drive through the camp you can cut another mile and a half off the hike by parking at the upper trailhead (any passenger car can do this). I specifically called Sky Ranch to ask if they minded if people drove through the ranch to the upper trailhead and they said it was no problem at all. If you’d like to verify this yourself you can call their Fort Collins office at (970) 493-5258.