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Routes
Hiking trails & Routes
United States
California
San Mateo County

Borel Hill and Windmill via Ridge and Ancient Oaks Loop

Routes
Hiking trails & Routes
United States
California
San Mateo County

Borel Hill and Windmill via Ridge and Ancient Oaks Loop

Moderate

4.9

(6409)

8,425

hikers

Borel Hill and Windmill via Ridge and Ancient Oaks Loop

02:36

8.94km

240m

Hiking

The Borel Hill and Windmill via Ridge and Ancient Oaks Loop is a moderate hiking route covering 5.6 miles (8.9 km) in the Russian Ridge Open Space Preserve. You will gain 801 feet (244 metres) in elevation over an estimated 2 hours and 36 minutes. This trail offers a diverse…

Last updated: March 7, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Russian Ridge Open Space Preserve

Waypoints

A

Start point

Parking

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1

1.44 km

Borel Hill

Highlight • Summit

Borel Hill is the highest point in the preserve at 2,575 feet (784 meters), with panoramic views of the Pacific Ocean to the west and across the San Francisco Bay …

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2

1.59 km

Ridge Trail

Highlight (Segment) • Trail

This beautiful trail takes you along the rolling green hills of the preserve, with views of Mount Diablo, Black Mountain, East Bay peaks, Mindego Hill, and the San Gregorio Watershed. …

Tip by

3

3.71 km

Mindego Hill Windmill

Highlight • Viewpoint

This spot has a lovely wooden platform with a bench where you can take a break and enjoy the panoramic views of the Silicon Valley side of Mindego Hill, which …

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4

6.35 km

Ancient Oaks Trail

Highlight (Segment) • Trail

This trail offers a fantastic combination of sweeping vista views, grassy hillsides, and gorgeous oak trees covered in moss. The path connects to the Mindego Trail and Charquin Trail for …

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B

8.94 km

End point

Parking

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Way Types & Surfaces

Way Types

5.77 km

1.92 km

1.21 km

< 100 m

Surfaces

3.88 km

3.02 km

2.04 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (770 m)

Lowest point (630 m)

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Weather

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Friday 10 July

23°C

12°C

-- %

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Frequently Asked Questions

Where can I park for the Borel Hill and Windmill Loop trail?

Parking is available at the Russian Ridge Open Space Preserve trailheads. On weekends, parking lots can fill up quickly, so arriving early is recommended to secure a spot.

Are dogs allowed on this trail?

Yes, dogs are generally permitted in the Russian Ridge Open Space Preserve, but they must be kept on a leash at all times. Please remember to clean up after your pet.

What is the best time of year to hike this loop?

The trail is enjoyable year-round, but spring is particularly ideal for experiencing spectacular wildflower displays. Fall offers clear views due to receding fog. Be aware that after a dry summer, the trails can be dusty.

Do I need a permit or pay an entrance fee for the Russian Ridge Open Space Preserve?

No, there are typically no permits required or entrance fees to access the Russian Ridge Open Space Preserve, where this trail is located. It is free and open to the public.

What kind of terrain will I encounter on the route?

The trail features a diverse mix of terrain, including open, rolling grassy hillsides and shaded sections winding through ancient oak and bay woodlands. You'll hike on both single-track paths and wider service roads, with surfaces primarily consisting of dirt and gravel. Some parts involve gradual ascents and descents.

What are the main points of interest along the way?

This loop offers several notable features. You'll reach the summit of Borel Hill, the highest point in the preserve with 360-degree panoramic views. Another highlight is the Mindego Hill Windmill, offering scenic vistas. The Ancient Oaks Trail section is known for its beautiful, moss-covered oak trees, creating an enchanted forest atmosphere.

Is this a family-friendly hike?

While the overall difficulty is rated as moderate, some sections are easily accessible. The full loop may be challenging for very young children due to its length and elevation changes. However, shorter variations within the preserve could be more suitable for families with younger children.

Does the trail intersect with other paths?

Yes, this route utilizes sections of several other trails. You will find yourself on parts of the Bay Area Ridge Trail - 04 - San Francisco and Peninsula, the Ridge Trail, Hawk Ridge Trail, Charquin Trail, and Alder Spring Trail during your hike.

What kind of views can I expect?

The scenery is a major highlight. From Borel Hill, you'll get stunning 360-degree panoramic views stretching from the Pacific Ocean to the San Francisco Bay. The Mindego Hill Windmill also provides excellent vistas, and the Ancient Oaks Trail offers a more intimate, forested view.

What wildlife might I see on the loop?

The diverse ecosystems along the trail provide opportunities for wildlife sightings. You might spot deer, various bird species, and in spring, the meadows burst with colorful wildflowers like lupine, poppies, and purple owl clover.

Are there any cafes or amenities nearby?

The Russian Ridge Open Space Preserve is primarily a natural area, so there are no cafes or amenities directly on the trail or within the preserve itself. You would need to drive to nearby towns for food, drinks, or accommodation.

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