
Moss along the old Mason trail
Details
Start at the Ira Spring trailhead, and follow the Ira Spring trail up the steeper grade to Mason Creek.
Cross the creek and begin the steeper grade up the other side. In about 0.2 miles, where the way begins to curve left and level a bit, a barely visible, unmarked path angles upslope to the left behind thin hardwoods. That's all there is. If you can't find it, this is not the right trail for you anyway — the Ira Spring Trail is plenty good.
The lower trail is firm and robust, with firm switchbacks in healthy salal. If you notice an apparent fork anywhere, keep to the right. At about 0.3 miles, you will see some spots of serious erosion — these motivated the new construction. The few boots that pass through today have no effect. Above the rough spots, the trail becomes increasingly pretty, with faint and even switchbacks on forest duff.

At about 1.2 miles, you reach
a stable boulder field. Cross straight ahead, slightly upward, hopping
from boulder to boulder all the way to the far side. Veer to the right,
and stay on the side boulders, climbing about 250 feet to find an
obvious notch in the timbered south-facing slope. There, you rejoin a firm
but rougher and steeper piece of the old trail. After a few minor switchbacks and
obstacles, the next 0.3 miles reach a more level and pleasant area in old
growth, where you step over a log and rejoin the final part of the Ira Spring
trail system, about 0.2 miles before reaching Mason Lake.