2.7
(23)
43
hikers
Cerro San Luis Loop
01:06
3.13km
290m
Hiking
Embark on the Cerro San Luis Loop, a challenging hike that covers 1.9 miles (3.1 km) with a significant elevation gain of 959 feet (292 metres). You can expect to complete this difficult route in about 1 hour and 6 minutes. The trail offers varied terrain, from smooth fire roads…
Last updated: April 23, 2026
Tips
Includes a segment that may be dangerous
A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.
After 3.06 km for 72 m
Waypoints
Start point
Get Directions
0 m
Cerro San Luis Natural Reserve Trailhead
Highlight • Trail
Tip by
2.65 km
Views of Bishop Peak
Highlight • Viewpoint
Tip by
3.04 km
Cerro San Luis Summit
Highlight • Summit
Tip by
3.13 km
End point
Way Types & Surfaces
Way Types
2.11 km
941 m
< 100 m
Surfaces
3.04 km
< 100 m
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Elevation
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Weather
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Today
Thursday 7 May
23°C
12°C
0 %
Additional weather tips
Max wind speed: 23.0 km/h
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This route was planned by komoot.
Frequently Asked Questions
Where is the main trailhead for the Cerro San Luis Loop?
The primary access point is the Cerro San Luis Natural Reserve Trailhead. It's conveniently located and easily accessible from downtown San Luis Obispo.
Is the Cerro San Luis Loop trail dog-friendly?
Yes, leashed dogs are welcome on this popular route, making it a great option for hiking with your canine companion.
What is the best time of year to hike this trail?
The trail is open year-round. However, much of the route has little shade, so hiking during cooler times of the day is advisable, especially during warmer months. Spring offers the added beauty of vibrant wildflowers.
Do I need a permit or pay an entrance fee to access the Cerro San Luis Natural Reserve?
No, there are no permits or entrance fees required to hike the Cerro San Luis Loop trail within the Natural Reserve. It's free and open to the public.
What kind of terrain can I expect on the Cerro San Luis Loop?
You'll encounter diverse terrain, from smooth fire roads to rocky single tracks, particularly as you approach the summit. The lower sections feature oak trees, and you might find natural tunnels formed by vegetation.
What are the main viewpoints or landmarks along the route?
From the Cerro San Luis Summit, you'll get panoramic views of the Central Coast, San Luis Obispo, and other 'Nine Sisters' peaks like Views of Bishop Peak. You might also spot Cal Poly, the Santa Lucia Mountains, and the Irish Hills.
Does the Cerro San Luis Loop intersect with other trails?
Yes, the route also passes through sections of the Cerro San Luis Fire Road, Baby Rock Garden, Lemon Grove Loop, Cerro San Luis Connector Trail, and Perimeter Trail, offering various options for exploration.
How long does it typically take to complete the loop?
Most hikers can expect to complete the main loop in about 2 hours and 5 minutes, though this can vary based on your pace and how often you stop to enjoy the views.
Is the Cerro San Luis Loop suitable for beginners?
While generally rated as moderate, some sections, especially the climb to the summit, can be strenuous. There are variations like the Lemon Grove Loop which is considered moderate, but direct summit routes are more challenging. It's not typically recommended as a beginner's first hike.
Are there any alternative routes or insider tips for hiking Cerro San Luis?
Yes, there are multiple trail options to reach the summit, allowing for different experiences. If you're looking for a less crowded option, consider exploring the 5-mile backside trail. Also, planning your hike for cooler times of the day is a good strategy during warmer months due to limited shade.
What is the 'M' on the side of the mountain?
One of the paths on Cerro San Luis leads to a large concrete 'M' on the mountainside, which represents Mission Prep School.