Its a fairly easy trail mainly used by horses with some intermediate sections and a few technical areas. I live right next to it so I use it to get to the lake from which I ride North Shore, or Granite Bay. Its a fun little trail, nothing to drive very far to, but if your in the area its a good warm up to get to the lake.
Head east on East Roseville Parkway, Turn right on Village Center Drive, Go to end of Village center and park, ride up (left side of road, going towards the lake) the paved bike trail, or take the side dirt trails to Treelake park. The pavement trail will spit you out into treelake park, there is a chainlink fence running along the right border of the park, the trail starts on the outside of this fence, follow it all the way across barton road until it spits you out on Auburn folsom, where you can turn left into the treeline and follow the trail to Beals Point, or just bike down Auburn Folsom to Beals Point.
Summary: Nice single track that's not to crazy,however with a few moderate climbs followed by smooth fast down hills there's just enough to keep your attention,especially on the turns.I almost found this out the hard way as my front began to wash out on top of the usual foliage and upon "closer inspection" what appeared to be decomposed granite underneath.
Also as joshljoshl stated in his review,do keep an eye out for the switchbacks as they will try to bite you in the @$$.
A few sections of the trail are starting to look like a veg.tunnel with blackberry bushes galore and what not,also there are piles of horse crap on occasion as it's a mixed use trail,however judging from what I've seen recently not to many use it.
All in all a good place for a mid week cardio work out if you live in Sac.,Roseville or the nearby communities.The trail isn't to long but if you get off work early enough you can always continue onto Beals Point or Folsom.
Recommended Route: Google Treelake Park,figure out the best way to get there from your part of town.You can park in the park,but you must have your car out a half hr. after sundown otherwise Parkford circle or Hadleigh Dr. are good choices.
Also if you zoom in all the way on the satellite map you can clearly see where the trail starts on the south side of the parking lot.
It's also a bit faster and funner on the way back so take your favorite beverage,add a few friends,a little snack,mix with trail.Enjoy.
Other recommended trails in the same area: The barrage around Folsom Lake and of course the excellent network that is the the Auburn Ravine/Foresthill area.
Summary: A fun trail that seems too easy until you have to walk across a creek, pick your bike up over a gate, and negotiate a few tight switchbacks that come out of nowhere. If the big Labrador is out in the yard (behind fence), you'll probably lube your chamois the first time he sneaks up on you. To me those features just make it more interesting. It's mainly uphill from start until the lake, but the hills are spread out. There's definitely opportunity to push yourself. I rarely see any other people on this trail.
Recommended Route: I usually start this trail from my house, not far from Old Auburn and Sierra College Blvd where there is parking at the beginning of the trail which is paved for the first mile or so. After a short warm-up you will reach the start of the dirt trail. When you go past the park, stay next to the ball field as the trail gets hidden when the blackberries are overgrown. I lost the trail the first time I tried this route. The trail winds behind and sometimes through backyards of some very nice homes. When I get to the end at Auburn-Folsom I may go right, hit the American River Bike Trail, and circle back up to Beals Point. Sometimes I go left and hit the Beals Point entrance without the extra hills. Tonight was my first time doing it in the dark - 25 miles in about 3 hours, about 90% dirt.
Other recommended trails in the same area: Once to Beals Point you are on the horse trail system (bikes allowed on most trails) that goes all the way to Auburn. Take the trails that go along the outside of the levee. There are some newly created that include good climbs and fun downhills! At the end of the levee you will hit a gravel road. Follow this to the right until you reach Granite Bay. Check the Granite Bay review for more info.