4(0=Paved, 6=Very Difficult 4WD) Only the last half mile requires 4WD. Most people park at the beginning of the 4WD road and walk the extra half mile.
From Ft. Collins, take CR-38E to Masonville.
From points south of Ft. Collins, take 287 to Hwy. 34 west. About six miles west of 287 on Hwy. 34, turn right onto Buckhorn Rd., also known as CO-27. There is a sign that says Masonville pointing the way.
Once at the main intersection in Masonville, head west (which means go straight if you came from Ft. Collins, or turn left if you came up via CO-27).
Go about 10 miles until you see the sign for Pennock Pass indicating a dirt road on the left (this is CR-44H and also Buckhorn Rd.). Take CR-44H approximately 18 miles over the top of the pass and down the other side until you run into CR-63E and the sign for Pingree Park.
Turn left on CR-63E and continue up this road about 3 miles until you see the sign for Tom Bennett Campground and FR-145 on the right side of the road. Turn right onto this road. The campground is immediate - go about a quarter mile up the hill and around the corner to find the Emmaline Lake Trailhead sign on the left.
Up until now, it's all easily accessible 2WD road.
You can park here if you don't have good 4WD, or you can continue on up to 0.5 miles if you can clear 12 to 18 inch tall rocks in the single-track road. There are two places to park or turn around along the way once you commit to it. If you go the whole half mile, the road terminates at a gate with room to park a few cars and turn around.
Pennock Pass (CR-44H) is closed in the winter. In that case, take 287 North 11 miles past Ft. Collins to Colorado Highway 14. Turn left on CO 14, and travel 26 miles to County Road 63E, Pingree Park Road. Turn left and travel 16 miles to FR-145 and the Tom Bennett campground.