User
Pass
help
 Robert Sibley Volcanic Regional Preserve, CAPrint Full | Basic
Directions
Description 1 Triplog 0 Topics
RatedFavorite   Wish List Region
 
Mine
0
Friends
0
 Bay Area, CA
Statistics
Difficulty 2.5    Route Finding
Distance Round Trip 4.5 miles
Trailhead Elevation 1,005 feet
Elevation Gain 1,000 feet
Avg Time Round Trip 2.5 hours
Kokopelli Seeds 9.5
Interest Historic, Seasonal Waterfall, Seasonal Creek, Perennial Creek & Peak
Course Loop Hike
Jim Lyding
Descriptions 94
Routes 193
Photos 3,707
Trips 340 map ( 2,490 miles )
Age 40
Location Walnut Creek, CA
Photos
Rated Viewed All Mine Friends
15  2011-01-09 Jim Lyding
Large Profile
Trailhead Forecast
Historical Weather
Radar
Backpack - Connecting Only
Seasons - ALL
Official Route
 
Alternative Routes
 
Water
Nearby Hikes Area Water Sources
direct air miles away to trailhead
0.7  Round Top Volcanic Trail
0.7  Huckleberry Botanic Regional Preserve
0.8  Round Top Trail Loop
1.4  Round Top and Volcanic Trail
2.0  West Ridge Loop Trail
2.7  West Ridge to East Ridge Trails
[ View More! ]
Flora
     Monterey Pine
Space

Granddaddy of the East Bay Regional Park system
by Jim Lyding

Mobile Version
Robert Sibley Volcanic Regional Preserve is centered around Round Top Mountain, the prominent forest-clad prominence just south of the Caldecott Tunnel. Round Top is part of an ancient volcano that last erupted 10 million years ago. The subduction of the Pacific Plate under the North American plate caused undersea sediment to be scraped off the top of the Pacific Plate. This sediment then piled up to form most of the coastal mountains in California. The volcano that became Round Top was eventually tilted on its side by the cross-movement of the Hayward and Moraga faults, and portions of its volcanic soil have only become visible fairly recently.

Much more recently in the 1930s it was foreseen that the East Bay would experience dramatic changes in land use: the large cities of Oakland and Berkeley would continue their inexorable growth eastward into the Oakland Hills; towns would turn into small cities; and hamlets would become booming bedroom communities. Thus, a movement arose to preserve the special outdoor areas in the East Bay, and the East Bay Regional Parks District was born. Robert Sibley Volcanic Regional Preserve was one of EBRPD's first parks. Robert Sibley was one of these early visionaries, and served as EBRPD's president and director from 1948 to 1958.

Hiking guides typically describe the main hike in Sibley as starting and ending at the visitors center off of Skyline Blvd. However, that route leaves out a great deal of fun and elevation gain. This hike begins off of Old Tunnel Road. The first stretch of this hike goes up the paved Quarry Road (itself a gated extension of Old Tunnel Road), and the elevation gain is relentless. After 400' AEG in the first half-mile you turn right onto the Quarry Trail.

The views really open up on the Quarry Trail with great views of the large Round Top Creek drainage, Round Top, and Mount Tam and the bay in the distance. As you make your way towards Round Top the San Leandro Creek drainage comes into view to the southeast, and the upper portion of that area is one of the wildest areas in the Bay Area with a thick forest and very little easy ways to get there. The Quarry Trail ends at its junction with the Round Top trail. This trail circumnavigates Round Top. Go left (clockwise) to experience more views to the east including Mount Diablo, and after a short uphill stretch the trail begins a descent through a thick forest of Monterey pine (non-native), California bay (native), and eucalyptus (most certainly not native). The trail gradually flattens out and soon reaches its junction with the semi-paved road to the top of Round Top.

Turn right on the road, and the summit is quickly reached after a lung-burning 400' over 1/3 mile. The summit is nothing spectacular with its profusion of towers and tall trees that block most views, but it's always nice to get to the top.

Head back the way you came, and stay on the road back to its signed junction to the spur trail to the visitors center. Go past the outdoor visitors center, and make a right turn to reach the northern end of the parking area. This is where the Skyline trail begins, and you'll be back at the trail head in just under a mile. This section is fairly steep in stretches, and follows Round Top Creek under dense tree cover. There's an abandoned cabin or logging operation off to the right that sometimes can be seen.

Much of this hike is on the Skyline trail/Bay Area Ridge trail. More on those two gems at a later date.

Gate Policy: If a gate is closed upon arrival, leave it closed after you go through. If it is open, leave it open. Leaving a closed gate open may put cattle in danger. Closing an open gate may cut them off from water. Please be respectful, leave gates as found.

-

    Directions Preferred Months Apr May Oct Nov
    Water / Source:Yes, but lots of cattle in the area
    Preferred Start6 AM Cell Phone SignalHigh Points Sunrise6:23am Sunset5:23pm
    Road / VehiclePaved - Car Okay
    Fees / Permit
    None

    Directions
    Print Version
    To hike
    From Hwy 24 just east of the Caldecott Tunnel exit at Fish Ranch Road. Head south on Old Tunnel Road (over the freeway if you came from the east) approximately 1/2 mile. There is a small parking area in front of the gate that marks the start of Quarry Road. Additional parking is located by continuing to the right along Old Tunnel Road just before the closest parking lot.
    Login for Mapped Driving Directions
    WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.
    page created by Jim Lyding on Jan 09 2011 8:40 pm
    Hike Arizona is member driven as seen above!     Support or

    HAZ was created for the love of hiking. Donations keep it online and fund development for future generations.
    enjoy hiking & enjoy life


    HAZ Tracks 1.8.6


    About Books FAQ Go Mobile Shop © 2014 HAZ