All trails on Moscow Mountain are on private land and are closed to motorized use. Please respect the land and wishes of the landowners.

This section of trail used to connect to Foothill Rd (and technically still does), but is now most commonly accessed from the middle of Headwaters Trail. To get to the beginning of Southside, head counterclockwise on Headwaters up to the first landing, and continue up the next part of trail. At the end of this short section you will cross an existing trail. This is Southside. Turning right will take up up a to an old road. Head right on this road for ~100' and look for the trail to drop off the right side again. Take this route for a short descent and steeper ascent where it pops up on the same road again. Continue on this road where it will eventually taper off to single track again. During the climb you will come where there is a fork in the road, with the main path straight ahead, and a different path uphill to the left. This trail to the left is called 'Moose Marbles', while Southside continues east where it eventually ends at the bottom of 'Switchblade.'