Cerro San Luis Mountain Summit trail San Luis Obispo Hike Madonna Mountain

Located just west of downtown San Luis Obispo, the 1,292-foot Cerro San Luis (or San Luis Mountain) offers sweeping views over the city and surroundings. Cerro San Luis is a member of the Morros, or Nine Sisters, a chain of prominent volcanic peaks stretching east from Morro Bay. These beautiful peaks set the postcard-like backdrop for San Luis Obispo and are excellent places to hike. Several trails explore Cerro San Luis, and its proximity to downtown makes it quite popular with hikers. The main trail to the summit begins from the end of Marsh Street just before the on ramp to the 101 Freeway. It provides a four mile out and back hike with 1,100 feet of elevation gain. This can be converted to a five mile round trip hike by using an alternate trail in one direction to loop back through other areas of the mountain. Lemon Grove Loop Trail overlaps the first half-mile of the hike and can be tacked on to the trek to extend the hike by 1.5 miles. Another alternative is to hike 5.7 miles round trip from Laguna Lake Park to the summit of Cerro San Luis.

Cerro San Luis trail
Cerro San Luis above the trail

Just a tenth of a mile from the trailhead, stay to the left through a junction with Lemon Grove Loop Trail. Angle northwest up the skirt of the peak through a mixture of Prickly peak cactus and sage. After passing a restful park bench, make another left, half a mile from the start, to leave Lemon Grove Loop Trail on a track to the summit. Turn left again when you meet a path heading back toward Lemon Grove Trail. Cross the southern side of the peak, staying to the left at a junction with “M” Trail, a spur trail over a short wooded bridge that climbs up to the white “M” on the side of the mountain. The “M” represents Mission Prep School the way the P on Yucca Ridge represents Cal Poly.

Continue west until you reach a wide dirt road, one mile from the start. This road was bulldozed by an angry Alex Madonna after the city denied his petition to build an alpine-themed convention center at the top of Cerro San Luis. To the left, the road descends to the stables behind Madonna Inn. Part of this trail is also used by hikers making the extended ascent from Laguna Lake Park.

Cerro San Luis trail
Looking down on Laguna Lake

Turn right and hike the final mile up this broad trail to the summit. After 0.4 miles, the trail bends around the northwestern slope of the mountain to offer a fantastic view of Bishop Peak. Three other Morros, Chumash Peak, Cerro Romualdo, and Hollister Peak, can also be seen from this vantage point.

The trail swings up the north side of the mountain as the vegetation thickens. Coastal live oaks provide occasional shade, while Indian paintbrush, Morning glories, Lupines, Monkeyflower, and other wildflowers add splashes of color along the trail in the spring.

Cerro San Luis trail
Bishop Peak and northern San Luis Obispo from Cerro San Luis Trail

Cal Poly and the Santa Lucia Mountains fill the view as the trail switches up to a short loop circling the top of the peak. Turn right or left and make your way east to the summit. Amble up a pile of boulders and take in the 360-degree views from the top of Cerro San Luis. There is a white platform at the top of the road where special church services are held. Around Easter, a tall white cross stands atop the summit, and at Christmas there are lights in the shape of a tree. Neither construction interferes with the sweeping views over San Luis Obispo.

Cerro San Luis trail
Looking west from the summit of Cerro San Luis

From the summit, head back the way you came or descend via the alternate trail (backside trail) to extend the hike from four to five miles. Track back a tenth of a mile along the southern side of the loop and locate a trail dropping off the mountain. Head down the trail, making a left through a junction after a hundred feet. This wide track curls around Cerro San Luis from south to east to north to west, eventually reconnecting with the main trail. This longer route is less crowded and offers different perspectives to enjoy.

A short distance from the top of the trail, there is a nice perch looking south. Proceed another 0.2 miles and come to a overlook by a large bounder where there are views east over San Luis Obispo. The trail enters an oak forest from here and becomes rocky as it descends the mountainside. Meet a junction on the northeast side of the mountain, 3/4 of a mile from the top. Make a left to continue around the mountain. Alternatively, turn right to drop down into a pasture north of Lemon Grove Trail. On the connector trail, bear right through unmarked to junctions to reach the Lemon Grove for a shorter route back to the trailhead. The backside trail continues another 1.25 miles around the skirt of the mountain, offering a close-up of Bishop Peak before angling uphill to meet the broad dirt trail on Cerro San Luis, directly across from the trail coming up from Marsh Street. Go straight across the road to travel one mile back to the trailhead, retracing the route at the start of the hike.

The trek to the summit of Cerro San Luis begins in a city-owned open space. The Madonna Family owns the mountain itself, but grants public access to hikers and mountain bikers. Dogs are welcome. No fee or permit is required to hike up Cerro San Luis, so get out and enjoy.

To get to the trailhead: From downtown San Luis Obispo, take Higuera Street southeast to Marsh Street and turn right. Pass beneath the 101 Freeway, and turn right on Fernandez Lane (the only road on the right before Marsh Street turns on to the 101 South). Turn right into the dirt parking area. The trail begins at the end of the lot.

Trailhead address: 1183 Fernandez Road, San Luis Obispo, CA 93405
Trailhead coordinates: 35.274897, -120.672369 (35° 16′ 29.62″N 120° 40′ 20.52″W)

Use the map below to view the trail and get directions:

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Alternate Trail (Backside Trail)
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These photos were taken in April of 2010, 2011, and 2015. Click to enlarge.
Nearby Trails
Lemon Grove TrailLemon Grove Trail
This 2.2-mile loop visits a historic lemon grove on the eastern slopes of Cerro San Luis.
Cerro San Luis M Trail“M” Trail
This spur off the trail up Cerro San Luis makes its own 1.9-mile round trip hike leading to the large white “M” installed halfway up the east side of the mountain.
California HikeCerro San Luis from Laguna Lake Park
This 5.7-mile hike summits one of the Nine Sisters just west of downtown San Luis Obispo.
Bishop Peak TrailBishop Peak
This 3.5-mile hike ascends 950 feet to highest summit in the Nine Sisters, offering excellent views of San Luis Obispo and the surrounding Morros.
Felsman Loop TrailFelsman Loop Trail
This 2.7-mile loop crosses oak, sagebrush, and grass-covered slopes around the base of Bishop Peak, providing excellent views of that notable rocky summit and its San Luis Obispo surroundings.
South Hills TrailSouth Hills Ridge Trail
This 1.5-mile round trip hike ascends 450 feet to the highest point in a cluster of hills near downtown San Luis Obispo, offering fine views over the city and surroundings.
Islay HillIslay Hill
This 1.8-mile round trip hike climbs 550 feet to the top of San Luis Obispo’s easternmost Morro.
Reservoir Canyon TrailReservoir Canyon
This 5.35-mile hike ascends 1,350 feet past a waterfall and a collection of junk sculptures to a treeless summit overlooking San Luis Obispo.
Cal Poly Canyon Design Village TrailPoly Canyon Design Village
This 2.5-mile hike visits an experimental architectural village designed by Cal Poly students at the base of the Santa Lucia Mountains.
San Luis Obispo hikesMore hikes in San Luis Obispo
Explore other trails around San Luis Obispo including Morro Bay State Park and Montaña de Oro State Park.
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Distance: 4 miles – Elevation change: 1100 feet

11 Comments on Cerro San Luis in San Luis Obispo

  1. […] up with a brisk walk on any one of San Luis Obispo’s famed hiking trails like Felsman Loop or Cerro San Luis, followed by fresh coffee and beignets at local favorite eatery, Big Sky Café.  Head back to the […]

  2. […] up with a brisk walk on any one of San Luis Obispo’s famed hiking trails like Felsman Loop or Cerro San Luis, followed by fresh coffee and beignets at local favorite eatery, Big Sky Café. Head back to the […]

  3. […] week Arleena and I revisited Cerro San Luis (or San Luis Mountain). Back in week 12, Arleena and I made a wrong turn on this trail that only […]

  4. laebrown says:

    Love this hike – The Lemon Grove Loop is great if you just want a quick trail run, while the hike to the summit is a must if you’re looking for a ~2 hour hike with sweeping 360 views of the entire city of SLO. Big, wide trails that are shared with mountain bikers (who are few and far between and attach bells to their bikes to warn hikers). The hike can be strenuous if you head out mid-day – be sure to bring water and wear sunscreen, as the trail doesn’t see much tree cover. This is a great diversion from Bishop’s Peak, and is a hike I see myself repeating in the near future. :-)

  5. Shelly Domingos says:

    We hiked to the M then continued the narrow, rocky trail to the top. You feel much higher than 1200+ft when you get there. Views of SLO are spectacular! We took the main trail down from the top. It was wide, much shorter and less strenuous. Finished the hike with the Lemon Grove trail. More of a great walk than a hike.

  6. […] Madonna, the family who owns the land, its actual representation is for Mission High School. The Cerro San Luis Obispo, more commonly known as Madonna, hike can be accessed by multiple trails. Its most common entrance […]

  7. […] was a beautiful hike. Cerro San Luis has many different trails going different directions, so I know I’m going to do another hike there sometime in the […]

  8. rita says:

    is there an easter sunrise service on Cero mountain this year ap 5 and what time ?

  9. […] Madonna is without a doubt one of the most undervalued hikes in all of Slo County.  Depending on where you […]

  10. Matthew says:

    There is no “Madonna Mountain” in San Luis Obispo, CA. This mountain has always been “San Luis Mountain” or more recently, “Cerro San Luis” if you prefer. The large “M” was placed on the mountain by students of the former (M)isson Central High School.

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