One Thing to Know
As you approach the top of the mountain the trail passes below cliffs with caves and huge boulders to explore. The summit provides a 180 degree view oriented towards the south east. Blue Mountain Lake and Eagle Lake appear close at hand. Bullhead Mountain and Snowy Mountain are among the prominent peaks on the skyline to the southeast.
Castle Rock is a prominent rock outcropping rising above the north shore of Blue Mountain Lake. This popular hike provides spectacular views of the lake.
From the parking area, follow the gravel road past the trail register. The trail follows this road for two tenths to an intersection with signs directing you to the right. Continuing for another tenth of a mile you come to a second intersection. Turn left, and cross the bridge, this is the most direct route to Castle Rock. The trail straight ahead goes to Upper Sargent Pond. It also connects with a continuation of the Castle Rock trail near the summit, making a loop hike possible. The loop route adds a half mile to the total distance.
On the direct route, the trail reaches an intersection after three fourths of a mile. The Castle Rock Trail bears to the right and the route to the left drops down to a landing on Blue Mountain Lake. Watch for this intersection, there is a sign but it is easy to miss.
Continuing, the trail climbs steadily at a moderate grade for a half mile before flattening out just below the top. The trail passes cliffs and huge boulders with caves and rock formations. At 1.3 miles (from the parking) you reach the intersection with the trail that connects with the Upper Sargent Pond Trail. The trail ascends steeply for the last one-tenth mile and care is needed in this section. Just below the top you pass through a narrow cleft in the summit rocks. The summit offers spectacular views of Blue Mountain Lake and the mountains beyond.
Blue Mountain Lake from Castle Rock
Connected Trails: From the intersection just below the top, the Castle Rock Loop Trail proceeds for .4 miles to join the trail to Upper Sargent Pond. That trail can be followed back to the parking area.
The Upper Sargent Pond Trail proceeds for 4.5 miles to the east end of the pond. The trail passes near Helms Pond, and much of the route is along a stream much beloved by the beaver. This little used trail provides an alternative to the more popular approach to Upper Sargent from the North Point Road near Long Lake.