Best mountain peaks around Los Osos are found within Montaña de Oro State Park and Morro Bay State Park. This region features a chain of ancient volcanic plugs known as the "Nine Sisters," offering diverse hiking experiences. The area provides panoramic views of the Pacific Ocean, Morro Rock, and surrounding coastal landscapes. These peaks are accessible from Los Osos, making it a central point for exploring the natural terrain.
Last updated: June 24, 2026
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Reaching the highest point of the Nine Sisters rewards you with stunning panoramic views. You’ll have a clear sight of the chain of peaks that runs along Morro Bay.
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Hazard Peak stands at 1,076 feet, making it one of the highest peaks in the area. Don't be misled by the name; it was named after Alexander Hazard, the previous landowner, and not because of any hazardous conditions. The views of the ocean and dunes from here are truly spectacular.
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Very good hike. Not very difficult to practice and very beautiful landscapes!
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Standing at 1,292 feet the summit of Cerro San Luis offers panoramic views of Bishop Peak and the rest of the SLO area. One of the Nine Sisters of volcanic peaks that run between Morro Bay and San Luis Obispo.
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The great views over the Irish Hills and the ocean are rewards of this climb. Take a deep breath and enjoy the landscape before you leave the peak.
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The views from the tallest peak of the Nine Sisters makes the effort worthwhile. You can see the chain of similar peaks along the Morro Bay.
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With its pyramid-like appearance, the Valencia Peak is attractive. The path that leads there is just as much because it offers both landscapes of mountains, desert and ocean views.
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Among the most popular peaks, you'll find Bishop Peak, which is the tallest of the Nine Sisters and offers extensive views of the chain of peaks along Morro Bay. Another highly regarded option is the Valencia Peak Trail, known for its diverse landscapes including mountains, desert, and ocean views leading to its distinctive pyramid-like summit.
For breathtaking 360-degree panoramic views of the Pacific Ocean, Morro Rock, and Morro Bay, Valencia Peak is an excellent choice. From its summit, you can see from Point Buchon to Morro Rock and sometimes even as far as Big Sur on clear days. Hazard Peak also provides full ocean views and panoramic vistas of the bay.
Yes, Black Hill in Morro Bay State Park offers a relatively easy hike. It's a 665-foot volcanic plug with trails winding through Monterey pine trees and chaparral. The approximately 3-mile round trip with a 600-foot elevation gain provides unobstructed 360-degree views of Morro Bay and the Pacific Ocean, making it a rewarding trek without being overly strenuous.
For a more challenging experience, Oats Peak is a good option. It stands at 1,373 feet and involves a 10.8-mile round trip with a 1,325-foot elevation gain, characterized by switchbacks. Valencia Peak is also considered moderately strenuous, with a 4.5-mile round trip and 1,275 feet of elevation gain.
The peaks around Los Osos are part of the 'Nine Sisters,' a chain of ancient volcanic plugs, making them geological marvels. You'll encounter diverse vegetation like coastal sage, eucalyptus, and Monterey pine trees. From Valencia Peak, you can observe the unique pyramid-like shape of the summit, while Oats Peak features a seasonal stream and coastal vistas.
Yes, several peaks offer excellent mountain biking opportunities. Hazard Peak is particularly popular for its winding singletrack trails. You can also find mountain biking routes that include Oats Peak, such as the Spooner's Cove – Oats Peak Trail loop. For more options, explore the MTB Trails around Los Osos guide.
Morro Rock is an iconic 576-foot volcanic plug and a significant landmark. It's a geological marvel and holds deep spiritual meaning for the Salinan and Chumash tribes. It also serves as a wildlife sanctuary, notably for the peregrine falcon. While you can walk along the beach or Harbor Walk to view it, climbing Morro Rock is prohibited to protect its sensitive ecosystem and cultural significance.
For the best views of the Irish Hills to the east, Oats Peak is highly recommended. This peak, slightly taller than Valencia Peak, offers expansive landscapes that include the Irish Hills, along with coastal vistas.
The region is home to diverse wildlife. Morro Rock is a protected habitat for species like the peregrine falcon. While hiking, you might encounter various birds, small mammals, and coastal flora. Always observe wildlife from a distance and respect their natural habitat.
Many trails, such as the one to Valencia Peak, offer very little shade. It is highly recommended to bring adequate sun protection, including sunscreen, a hat, and plenty of water, especially during warmer months. Starting early in the morning can also help avoid the midday sun.
Beyond mountain biking, the Los Osos area also offers various road cycling routes. You can explore options like the Cabrillo Highway 101 Bike Lane loops or routes around Morro Bay. For detailed information and route suggestions, refer to the Road Cycling Routes around Los Osos guide.
Both Valencia Peak and Hazard Peak provide inviting picnic tables at their summits. This allows hikers to relax, enjoy a meal, and soak in the expansive panoramic scenery after their climb.


See even more amazing summits around Los Osos with these guides: