South Continental Divide to Black Tail Ridge Mountain Bike Trail
First off this is an excellent trail with a little bit of everything to get your thrills. Leaving south from the trail head expect varying grades of ascents and descents. The trail flows niceley and once you start to reach the summit of the South CDT (Continental Divide Trail) you can expect some spectacaular views from all directions. The last few miles of the South CDT is probably the most difficult, the switchbacks to the summit are very gradual and with only a few tight spots. Once you reach the summit you'll head down some great downhill with switchbacks leading you down to Pipestone Pass. Be sure to look for the intersection to the Beaver Ponds Trail, don't worry about missing the turn it is marked well. Once you are on the beaver ponds trail you can have some fun on the natural rock features on the trail. On the next marked trail you'll want head down the Black Tail Ridge Trail, this will lead you to the parking lot. The last two miles on the Black Tail Ridge offers a nice smooth downhill to end your ride.
Since this is a shuttle style ride you'll need to park a car down at the parking lot at the end of Majestic View St. From Butte, take I90 East to the Mt Highland exit. This is the most eastern exit for Butte. Go west on Mt Highland, and then go south on Continental Drive. Turn left onto Meadow View Drive. You will see a sign for Blacktail trailhead and then right on Majestic View St. This will take you to the trailhead. You'll end here. The start of the trail head is located just off the I-90 on top of homestake pass. You'll need get off the interstate at the Homestake exit, head to the south side of I-90 and you will see the trail head directly in front of you.