I had a few hours in the afternoon, so I went hiking. I'd heard of ""the old trail"" up Mount Si, but only knew that it started at the Little Si trailhead. Hiking up that trail, I took the 2nd right turn after it levelled out (I should have taken the third!). Unaware that I was on the wrong trail, I hiked up to some mossy boulders with bolts sticking out of the moss. ""Crazy climbers"", I thought, but the next joke was on me as I was lured into deep and steep brush by dozens of flags and pieces of string tied along the trees. ""BRH PRJ"" said the flagging. 30 minutes later, I got back on the trail which dropped to a road. The road then climbed to a scary ""Meth lab"" looking house. I heard someone crashing around near the house, so I bushwhacked to the road higher up, not wishing to disturb someone(thing?). At least the road kept going up, albeit slowly. Eventually, I hit the old trail! Boy was I happy! I scurried up the steep switchbacks like a field mouse, cunningly reaching the main trail mere yards from the boulderfield. I scrabbled to the tip top summit, dodging falling rocks and bodies as Mr. Manning suggests. Mountains to the east were socked in and rainy. North Bend popped and fizzed through the afternoon, the celebrations getting underway. I ran down the trail, and nearly jumped out of my skin when I saw another person on it at 2000 ft! He had gotten disoriented, and his legs were tired and sore. Just to be safe, we stuck together until reaching the paved road. What a great trail it is, and forgiving of my routefinding errors!