5.49 mile partial loop near the highest point in the Santa Cruz Mountains.
One of the best hikes in the Bay Area, it offers outstanding views west,
pretty oaks, woods, and chaparral, and unique sandstone formations.
Distance, category, and difficulty:
Overall, this 5.49 mile partial loop hike is moderate, with
about 1000 feet in elevation change. Trailhead elevation is about 3090 feet.
The featured hike descends to about 2300 feet, then gradually ascends back
to the trailhead. Some short sections of trail are steep, and there are
portions of Saratoga Gap Trail that require brief scrambles on narrow exposed
paths with sharp dropoffs.
Shaded and the beginning and end, mostly exposed in the middle.
Dirt trails, with some rocky scrambling on Saratoga Gap Trail.
Good all year -- waterfalls at peak in late winter and spring.
From Interstate 280 in San Mateo County, take CA 92 west, then turn
south onto Skyline Boulevard (CA 35). Drive about 25.5 miles, to the
junction of 35 and 9 (Saratoga Gap). Continue about 2.5 miles further
south on 35, to the park entrance on the right side of the road.
From CA 85 in Santa Clara County, exit Saratoga Avenue. Drive west
into Saratoga, then continue uphill on CA 9. At Saratoga Gap (junction 9
and CA 35), turn left and drive south about 2.5 miles to the park entrance
on the right side of the road.
Street address (for in-transit navigation):
15000 Skyline Blvd., Los Gatos, CA 95033
Get driving or public transit directions from Transit and Trails:
GPS coordinates* for trailhead:
Longitude 122° 5'45.01"W
(* based on Google Earth
data, shown as degrees, minutes, seconds)
Gas, food, and lodging:
There are no services in the immediate area, but you can find gas, stores,
and restaurants on CA 9 either east in Saratoga, or west in Boulder Creek.
The Castle Rock backpack camp is for many the start of the long Skyline
to the Sea Trail trip, but Castle Rock does not have a drive-in campground.
Large parking lot, and some free roadside parking just past the entrance
on the right side of the road. Mind the no parking signs at the pullout.
There is a day use entrance fee of $8/$1 for seniors (additional fees apply
if you leave your vehicle in the lot overnight). There are two designated
handicapped parking spots in the parking lot, but the trails are not suitable
for wheelchairs or strollers. Pit toilet on north side of parking lot. Pay
phone in lot. No drinking water at the trailhead or on the trail. Maps are
available for $2.00 when kiosk is staffed; there is a map under glass at
the information signboard on the south side of the parking lot, just past
the entrance. There are other walk-in entrances to Castle Rock with little
parking: on Skyline Boulevard near Sanborn-Skyline County Park's Summit
Rock, several pullouts on CA 9, and from Saratoga Gap, where there
is a parking lot (not managed by the parks department), but no other amenities.
There is no direct public transportation to the park.
Dogs and bicycles are not permitted in the park. Horses are allowed on
some trails, but others are signed hiking-only. Trails close at sunset.
The Official Story:
Castle Rock page
Park office 408-867-2952
is described and mapped in 60 Hikes within 60 Miles: San Francisco,
by Jane Huber (yup, that's me, the creator of this website). Order
this book from Amazon.com.
brochure (with map) pdf
Order the Saratoga to Big Basin map from Redwood
South Bay Trails, by Jean Rusmore, Betsy Crowder, and Frances
this book from Amazon.com) has a simple map and trail descriptions.
The Bay Area Ridge Trail, by Jean Rusmore (order
this book from Amazon.com) has a good map and descriptions of Castle
Rock's Ridge Trail segment
The Santa Cruz Mountains Trail Book, by Tom Taber, has a
simple map (order
this book from Amazon.com).
Trail Map of the Santa Cruz Mountains (map 1), by the Sempervirens
Fund (includes Castle Rock, Big Basin, and Portola Redwoods) has a great
map of Castle Rock.
Rock in a nutshell -- a printable, text-only guide to the featured
View 38 photos from
this hike (shorter version; autumn hike on Ridge Trail, connector
path, Saratoga Gap Trail, and Castle Rock Trail).
View 71 photos from
this hike (longer version; winter hike on Ridge Trail and Saratoga
Go to Bay Area Hiker Home page
I look at a trail map of the Skyline-to-the-Sea route
from Saratoga Gap to the Pacific Ocean, it's hard for me to grasp the
magnitude of that hike: it's 32 miles (one way) and the elevation drops
about 2,600 feet, with lots of ups and downs along the way. From
the Saratoga Gap Trail at Castle Rock State Park, the backdrop to this
awesome adventure is laid out at your feet. Although the trail is
not visible, you can see the miles of rolling, forested hills that lie
between Skyline Boulevard and the Pacific Ocean. Castle Rock is unique;
in addition to the park's stunning rock formations and beautiful views,
it's a staging area for long journeys to the sea, or just for great day
hikes lasting a few hours.
From the Saratoga Gap trailhead, you can take
out-and-back hike along CA 9 on Skyline-to-the-Sea Trail, or make a loop
out of Saratoga Toll Road, Travertine Springs Trail, and the Saratoga
Gap Trail, a more than 10 mile trek. For a backpacking excursion, you
can hike from the park's main entrance into Castle Rock Camp, stay overnight,
then continue west into Big Basin State Park. On the opposite extreme,
the shortest loop at Castle Rock is less than a mile, and combines Castle
Rock and Saratoga Gap Trails.
This park is popular with rock climbers,
and can get busy in warm weather. Voices carry far here, and the park
also gets an unwelcome dose of noise pollution from the gun club about
1 mile north of the park entrance on Skyline Boulevard. I prefer visiting
in winter, when the views to the west are clear, and the weather cool. The
gun club is also quieter in the winter, especially if weather is cold
and rainy. Keep in mind that it can get bone-chillingly cold in this part
of the Santa Cruz Mountains, particularly in the heavily forested area
near the main park entrance. Temps in the 20s are not uncommon in
the winter months, and neither is snow. Dress accordingly, and be
careful on the roads, which can get icy.
Castle Rock is not a park I would recommend
to beginning hikers, or those with mobility problems. The trails are narrow,
the drop-offs sharp, and the some of the trails can be slippery. Although
most of the trails are straight-forward, some segments are somewhat technical. It's a tough place for knees and hips, as you must scramble
up and down some boulders and navigate steep sandstone shoots. This doesn't
mean you shouldn't go if you're in good shape, because the views from
Saratoga Gap and Ridge Trails are worth a few sore joints. A trekking
pole (or two) is definitely recommended.
This featured hike travels through a lovely oak
savannah and chaparral-studded hillsides, under California bay, madrone,
tanoak, and Douglas fir, and past the fascinating sandstone rock formations
known as tafoni. Start in the main parking lot and look for the
start of the Saratoga Gap Trail to the west, near an information signboard
and two low, red-painted barricades. Saratoga Gap Trail initially
runs along a seasonal stream, under a heavily shaded tanoak, madrone,
and Douglas fir forest. At 0.17 mile, Castle Rock Trail departs from
the left side of the trail at a signed junction. Continue downhill
on the Saratoga Gap Trail.
The trail skirts a large rock that bulges
out onto the path. The easy downhill grade stiffens a bit. From time to
time, particularly during stormy months, fallen trees make
the trail an obstacle course. As a perennial stream joins the (usually)
dry creek, Saratoga Gap Trail crosses over the stream, and then at a signed
junction meets Ridge Trail at 0.67 mile. Look for wild ginger and giant
chain fern along the creek. Take Ridge Trail, right, uphill.
The narrow path ascends,
passing a large, white rock outcrop
and moss-covered live oaks. After only a few moments, the trail leaves
the woods and enters chaparral. Look for chamise, pitcher sage,
varieties of ceanothus, California coffeeberry, manzanitas, and toyon.
In winter, a single flowering
currant puts forth pink blossoms on the right side of the trail at a shady
spot. The views west are breathtaking. Ridge Trail commands your
attention, as tree roots amble across the path like sleeping swollen snakes,
and the trail, smooth and sandy one minute, a pile of boulders the next,
is one surprise after another. On the right side of the trail, a
large outcrop, know as Goat Rock, is visible uphill. Steps are cut
into some soft rock in one section. At another area, there is a pile of
boulders under the cover of a coast live oak, and the trail is a bit confounding.
"The trail is where?" you may ask, particularly in the winter when leaves
cover the path and foot traffic is limited, making it difficult to see
where others have gone before you. Like a few other confusing trail
sections, if you take it one step at a time the routing
is obvious; it's just impossible to see ahead more than a few feet. The
toughest call is an unmarked junction of sorts, where a legitimate-looking
trail seems to continue on a level course straight ahead, and an unlikely-looking
rock pile heads uphill on the right. Pick your way up the rocky slope,
and the trail becomes evident again. Follow the trail sign, staying to
the right at another confusing non-junction, and continue uphill. Wooden
fencing and steps constructed in 2000 improve the final ascent to Goat
Rock, which previously was a steep, undefined hillside scramble.
At the top of the hill, at 1.17 miles, you'll reach the top of Goat Rock
and two signed junctions (one to the right and one to the left). Bear
left and after a few feet, at another junction, bear right on
Ridge Trail, "to Campground." (Option: at the top of the
steps near Goat Rock, turn right and take the trail marked "to Interpretive Center." The path edges near rocks very popular with climbers, and
then cuts through a grassy oak-studded slope to the Interpretive Center.
Exhibits in the open-air pavilion include a treatise on sandstone formations,
identification drawings of the 7 types of oak found at Castle Rock, and
a rudimentary trail map. Exit to the north and look for Ridge Trail,
signed "to campground.")
Black oaks and California bays mingle with madrones
as the trail winds levelly through grassland. Looks like feral pigs have
invaded the park in a big way, for the ground beneath the oaks was completely
"pig rototiled" on one visit. At 1.36 miles, Ridge Trail
meets the path from the Interpretive Center at a signed junction. Bear
left to stay on Ridge Trail.
This narrow trail cuts through grassland,
gently descending under some live and black oaks, and madrones. Stay
to the right as a faint trail breaks off and heads west, to a bird-watching
viewpoint. I love walking through here in the winter, when it is
quiet (at least as quiet as it ever gets) and many fallen leaves from
the deciduous oaks litter the trail. As a transplanted easterner,
I delight in the crunch of leaves underfoot, and that smell that defines
autumn for me. At 1.66 miles, you'll reach a signed junction with a connector
to Saratoga Gap Trail. Continue straight on Ridge Trail, "to campground."
(Option: to shorten this hike, take the trail to the left, signed "to
Saratoga Gap Trail." The connector trail between Ridge Trail
and Saratoga Gap Trail winds downhill; turn left onto Saratoga Gap Trail
at a signed junction and follow the remaining instructions below.)
The trail continues to lose elevation
at a gradual pace as it descends just downslope from a ridgeline. The trail skirts a rock formation,
where manzanitas seem to be dying out, their sunlight blocked by encroaching
trees. Tanoaks, live oaks, and madrones dominate, but the trail also passes
beneath a small grove of very tall pines. Somewhat abruptly, Ridge Trail
steps out from the trees to a viewpoint at the edge of the ridgeline.
The sheer rocky drop is softened by thick stands of buckbrush, manzanita,
and chamise. Ridge Trail pops back under tree cover, but then draws near
the cliff again, where a wooden fence guards against what would be a nasty
fall. This is my favorite viewpoint, and a nice spot for lunch on a sunny
day. The trail sweeps back into the woods, and continues a descent toward
the campground. At 2.60 miles, Ridge Trail meets Saratoga Gap Trail at
a signed junction. Turn left onto Saratoga Gap Trail.
Tanoaks and madrones line the hiking-only trail,
which soon takes a sharp turn left and leaves the forest. Saratoga Gap
Trail narrows as it creeps beneath a rocky outcrop still somewhat shaded
by live oaks and California bays. A
metal guidewire helps you navigate a short steep drop over a small boulder.
Then the path edges along an exposed hillside, with wonderful views to
distract you from the demanding trail. Manzanitas, ceanothuses, and chamise
dominate, but look for silktassel, lupines, coyote brush, yerba santa,
and monkeyflower as well. There's another tricky section of trail where
you must scramble up and then down a small outcrop. Saratoga Gap
Trail makes a transition into oak grassland, where poison oak is common
in the understory. This area is lovely in autumn, when black oak
trees put on a foliage show. At 3.70 miles, Saratoga Gap Trail meets the
connector path to Ridge Trail at a signed junction. Continue straight
on Saratoga Gap Trail.
A patch of sagebrush flourishes on the left,
and a few buckeyes huddle together in a little gulch on the right. The
trail leaves oak grassland and returns to chaparral. There are nice views
to the rock formations
on the hillside near Goat Rock. Saratoga Gap Trail crosses through a California
bay wood near a stream, where a bench sits just before a narrow bridge.
There's no view from here, but it's nice and shady. Look for a small
young redwood grove on the right. After crossing the stream the trail
climbs slightly, passing a handful of madrones, which in winter drop curled
strips of bark that look like cinnamon sticks. As the trail crests,
it veers left and edges along the side of the mountain, through chamise,
manzanita, ceanothuses, and aromatic pitcher sage. Saratoga Gap
Trail follows the contour of the slope and features views to the north
and southwest. You may glimpse bobcat and coyote tracks on the trail,
some brief sections of which are steep and awkward to negotiate. Even
before spring reaches Castle Rock, some plants enliven the chaparral with
their blossoms. Manzanitas put forth urn-shaped flowers around
late February, and you might also see blue-witch nightshade and Indian
paintbrush at that time. Buckbrush and wartleaf ceanothus generally bloom
in March. There are a few flat rocks on the west side of the trail, perfect
perches on which to sit and stare out into space. I have one flat
boulder I call my sitting rock. It's a meditative spot, peaceful and serene.
On a December hike I watched two hawks fly so far up in the sky I could
barely follow their movements. I wished I could join them; something
about this view makes me want to fly. On the east side of the trail,
across from my special rock, there's a well-preserved tafoni formation. If
you stop and sit on this rock, or any other, be careful not to fall off
the side of the hill! Saratoga Gap Trail tapers off to a mostly level
grade. Along the trail occasionally a few California bays provide a little
shade. The path squeezes between two boulders, and then begins a return
to a California bay, live oak, Douglas fir, and tanoak forest. On the
left side of the trail two huge old live oaks seem to be
growing out of a patch of moss-covered boulders. You must climb through
a pile of large rocks, a rather illogical stretch of trail which seems
to me could have been routed down the slope a bit. In late winter, look
for the delicate flowers of wild strawberry, nestled close to the ground.
Sounds of rushing water drift down the trail, indicating that you're nearing
the falls. For the best view of Castle Rock Falls, hop down onto
the viewing platform on the right side of the path at 4.66 miles. From
there you'll have a view of the water as it sluices through a rock channel
and then drops 75 feet or so. Even before the storms rage in the
winter, this waterfall is active.
Continue up Saratoga Gap
Trail to the previously encountered junction with the Ridge Trail,
at 4.82 miles. Turn
right and retrace your steps uphill on Saratoga Gap Trail. (Option:
when you reach the signed previously encountered junction with Castle
Rock Trail, turn right. This gently graded path meanders uphill underneath
oak, California bay, madrone, and Douglas fir to the tafoni formation
known as Castle Rock. The rock is large and impressive, although unfortunately
the area surrounding it is sometimes defiled with broken bottles, so step
carefully. Castle Rock juts out from a flat spot, like a fairy tale mansion,
and the formation may set your imagination in motion. Weird stone pockets
look like secret caves, and rock cascades off the side like a cresting
wave. When you're done daydreaming, continue on Castle Rock Trail,
pass another group of large boulders off to the right side of the trail,
and then as a fire road continues straight, turn left toward the parking
lot at a signed junction. Follow the trail back to a fork, and then take
either branch to return to the parking lot.)
Total distance: 5.49 miles (6 miles if you
decide to visit Castle Rock)
Last hiked: September 24, 2013
Previous visit: March 5, 2002