Challenging Hikes

Here are some challenging hikes you might want to try.  Challenging trails are those that have significant elevation gain (1,000 feet or more), are 6 – 20 miles or more in length, trail conditions vary from good to rugged, and they generally take 4 – 8 hours to complete.  These hikes are not for the faint-hearted!

Black Diamond Mines Regional Preserve
Stewartville – Star Mine – Lower Oil Canyon – Oil Canyon – Upper Oil Canyon Trails 
This route takes you by a trail that leads to the 200-foot deep Prospect Tunnel!
Length: 9.3 miles round-trip

Crockett Hills Regional Park
Edwards Loop – Sky – Big Valley – Sugar City – Kestrel Loop – Big Valley – Sky – Soaring Eagle – Edwards Loop Trails 
Crockett Hills Regional Park features panoramic views of the Delta, San Pablo Bay, Carquinez Bridge, and Mount Diablo and supports annual grasslands, oak woodlands, and coastal shrub plant communities.
Length: 6.93 miles round-trip

Cull Canyon Regional Recreation Areas 
Chabot-to-Garin Regional Trail 
Dense forests and far-reaching views abound on this trail sure to remove you from the hustle and bustle of urban life.
Length: 14 miles round-trip

Del Valle Regional Park 
Arroyo Road Staging Area to East Shore – Heron Bay Trails  
This hike features several steep climbs and descents.
Length: 7.8 miles round-trip

Diablo Foothills Regional Park 
Castle Rock – Stage Road – Little Yosemite – Briones to Mt. Diablo – Hanging Valley – Stonegate – Buckeye Ravine – Shell Ridge Loop – Borges Ranch Trails 
This challenging hike travels through several different environments including a seasonal waterfall (January – April), open grass lands, and pine forest, and offers expansive views!
Length: 7.34 miles round-trip

Las Trampas Regional Wilderness 
Elderberry – rocky Ridge View – Devil’s Hole – Sycamore Rocky Ridge View Trails 
This strenuous hike offers magnificent 360 degree views of Mount Diablo, the Tri-Valley, and the San Leandro Watershed.
Length: 6.0 mile loop

Pleasanton Ridge Regional Park 
Sycamore Grove – Woodland-Ridgeline – Thermalito Trails 
This route features several different trails, crosses many distinct ecosystems, and has over 1,000 feet total elevation change.
Length: 11 miles round-trip

Redwood Regional Park 
Canyon Meadow Staging Area to Stream – Tres Sendas – French – Orchard – Bridle – Stream Trails 
Redwood Regional Park contains the largest natural strand of coast redwood in the East Bay; the serenity and beautifully lighted landscapes of these forests are unmatched in the region.
Length: 6.57 mile loop

Round Valley Regional Preserve 
Miwok – Murphy Meadow Trails – Round Valley Group Camp and back The trail system is great for all types of users, especially mountain bikers and equestrians.
Length: 7.26 miles round-trip

Tilden Nature Area to Wildcat Canyon Regional Park 
Laurel Canyon – Nimitz Way – Havey Canyon – Wildcat Creek Trails 
This hike exemplifies the diversity and beauty of the Berkeley hills while awakening and freeing the senses with an ever-changing landscape of habitats.
Length: 7 miles round-trip

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