Humbug is a great hike on the South Coast, even if it is a steep six miles round trip and 1700 feet of gain. Find the well-marked and large parking lot for the trailhead about five miles south of Port Orford, Oregon on the west side of Highway 101. No parking pass is required.
After you climb about a mile, there is a slightly shorter (and slightly steeper) option to take the West Trail - I suggest that you try both, as the West has some nice peak-a-boo views, and the East has some amazing old growth. All trails are well-graded and likely busy during the summer months.