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Cerro San Luis Obispo facts for kids

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Cerro San Luis Obispo
SanLuisObispoCalifCityView600.jpg
Cerro San Luis Obispo (left)
Highest point
Elevation 1,292 ft (394 m)  NGVD 29ef>
Naming
English translation Bishop Saint Louis Hill
Language of name Spanish
Geography
Location San Luis Obispo County, California, U.S.
Parent range Santa Lucia Range
Topo map San Luis Obispo
Geology
Age of rock 20 million years
Mountain type Volcanic plug

Cerro San Luis Obispo is a cool mountain in San Luis Obispo, California. It stands about 1,292 feet (394 meters) tall. This mountain is part of a special group of peaks called the Nine Sisters.

People love to visit Cerro San Luis Obispo for outdoor fun. You can go hiking, jogging, or even mountain biking here. The mountain has some steep parts, making it a good challenge. On its west side, there's a flat area with a big wooden stage. You might also spot a large white "M" on the east side. This "M" was put there by students from Mission Central Catholic High School.

Discover the Mountain's Past

Early Settlers and Fruit Trees

Around the year 1900, a man named G. W. Chandler lived on Cerro San Luis Obispo. He was a veteran from the American Civil War. Mr. Chandler planted many lemon and orange trees on the mountain.

These fruit trees are still there today, looking over the city. They get their water from two natural springs. There's even a trail at the bottom of the mountain called the Lemon Grove Trail. It got its name from these very old groves.

The Madonna Inn Connection

Later, in 1958, a local business owner bought some land on the mountain. His name was Alex Madonna. He built the famous Madonna Inn right at the base of Cerro San Luis Obispo.

Fun Activities on the Trails

Explore Hiking and Biking Paths

Cerro San Luis Obispo has many trails for you to explore. These paths are perfect for hiking, jogging, and mountain biking. It's a great place to get some exercise and enjoy nature.

The main starting point for trails is at the end of Marsh Street. From there, you can get onto the Open Space and Lemon Grove Loop trails. A dirt road from the Lemon Grove Loop leads all the way to the top of the mountain.

The Rocky "Rock Garden" Path

There's another path to the summit that's a bit more adventurous. It used to be a road but has become very rocky over time. This narrow, rocky path is now called the "Rock Garden." It's a favorite spot for mountain bikers who like a challenging ride downhill.

You can also find a trail that goes all the way around the mountain. It's about one-third of the way up from the bottom.

360° panorama from the summit of Cerro San Luis Obispo. Bishop Peak is to the left. In the left-center lies the Cal Poly campus. Laguna Lake appears on the right. Photographed on an early November morning.

What Are Its Other Names?

Why So Many Names?

The official name for this mountain is "Cerro San Luis Obispo" or "Cerro San Luis." But you might hear people call it by other names too! For a long time, it was known as "San Luis Mountain." Many people still use that name today.

Some call it "Madonna Mountain" because the Madonna family owns much of the land around and on the mountain. Others might say "Mission Mountain" or even "Mount San Luis." This might be because of the "M" on its side. The "M" was placed there by students from Mission Central Catholic High School in 1966. The mountain is also close to the Old Mission San Luis Obispo de Tolosa.

How the Mountain Was Formed

A Volcano's Ancient Core

Cerro San Luis Obispo is made of a type of rock called igneous rock. This means it was formed from hot, melted rock that cooled down. The mountain is actually the hard core of a very old volcano!

Millions of years ago, this volcano pushed up through other rocks. Over time, the softer parts of the volcano wore away. What's left is the tough, rocky core we see today as Cerro San Luis Obispo. It's like looking at the inside of an ancient volcano!

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