From Marcola take Tree Farm Road. About a 1/4 mile past the end of the paved road (gravel beyond this point) you will find the locked Gate and Posted No Trespassing. There are homes both sides of the road right up to the gate.
The property is controlled by Giustina Land and Timber. The have a website that you can check on acess:
www.giustinalandandtimber.com/land-acess/
Phone number: 541-345-2304 or 541-345-2301
There is a Locked Gate and currently Posted Extreme Fire Danger No Public Access Sign where the route turns left off Mountain Home Drive (see blue dot). At that point the road is gravel up to Scott Mountain summit. I came in from Highway 20 to Liberty Road to Mountain Home Drive. The Property is posted by Cascade Timber out of Sweet Home. Once the fire danger has been removed you can access the summit but it about a 2 mile hike up as no unauthorized vehicles are allowed.
There has always been a locked gate about .5 miles from the summit (Radio Site Towers) that you could park at the gate and hike up to the summit (See N7CNH report on Buck Mountain and Tom, Mount). However, it has now been Posted as No Trespassing (by both Weyerhaeuser and American Tower).
About 2 miles from the Summit there is a locked gate (see blue dot on google map) and new sign "Private Property No Trespassing" posted.