Old Saint Hilary'S Open Space Preserve is a 232-acre county park situated in Marin County, California. This open space preserve features varied terrain, including rolling grasslands and multi-use trails, which are ideal for a range of outdoor pursuits. Its unique serpentine soil supports a distinct ecosystem, while high points offer expansive views of the surrounding bay areas. The preserve provides opportunities for several sports like hiking, touring cycling, road cycling, jogging, and more.
130
Routes
4.5
(235)
Average rating
6045
People visited

4.8
(72)
1,214
riders
38.2km
02:34
590m
590m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.9
(9)
157
riders
22.1km
01:11
160m
160m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(3)
96
riders
47.2km
03:52
1,320m
1,320m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(3)
92
riders
15.3km
01:18
290m
290m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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5.0
(8)
29
hikers
22.0km
06:21
540m
550m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

20
hikers
3.24km
00:50
20m
10m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

7
hikers
16.6km
04:13
50m
50m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5
hikers
5.45km
01:22
10m
10m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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5.0
(11)
299
riders
42.0km
01:52
360m
360m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

5.0
(2)
128
riders
31.0km
01:52
710m
710m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

1.0
(1)
212
riders
43.4km
02:33
1,000m
1,000m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

4.9
(7)
164
riders
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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5.0
(1)
14
riders
15.3km
01:15
290m
290m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

5.0
(4)
17
riders
21.3km
02:17
620m
620m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

24
riders
21.3km
02:03
540m
540m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

5.0
(5)
12
riders
32.2km
02:27
630m
630m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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14
runners
6.79km
00:54
200m
200m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

89
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

40
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

42
runners
7.56km
00:47
20m
20m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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4.8
(6)
79
riders
47.4km
04:24
1,270m
1,270m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(1)
59
riders
32.9km
02:23
570m
570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(4)
66
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

14
riders
45.7km
04:00
1,180m
1,180m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Old Saint Hilary'S Open Space Preserve offers a variety of outdoor activities including hiking, touring cycling, road cycling, jogging, mountain biking, and gravel biking. The preserve features multi-use trails and fire roads suitable for different experience levels. More than 100,000 visitors have explored the area.
The preserve is known for its panoramic views of the San Francisco skyline, Golden Gate Bridge, and various bays. It features rolling grasslands, a babbling creek, and unique serpentine soil supporting over 200 plant species. The historic Old Saint Hilary's Church, built in 1888, is a prominent landmark within the preserve.
Yes, Old Saint Hilary'S Open Space Preserve offers trails ranging from moderate to strenuous. Some trails provide significant elevation gain, while others offer a more relaxed experience. For specific options, explore Hiking in Old Saint Hilary'S Open Space Preserve or Easy hikes in Old Saint Hilary'S Open Space Preserve.
Cyclists can enjoy touring cycling, road cycling, mountain biking, and gravel biking on the preserve's multi-use trails and fire roads. The Vistazo Fire Road is suitable for bikes. Detailed routes can be found in guides such as Cycling in Old Saint Hilary'S Open Space Preserve and Road Cycling Routes in Old Saint Hilary'S Open Space Preserve.
Yes, the preserve offers family-friendly options, particularly for hiking. The Vistazo Fire Road is noted as suitable for off-road jogging strollers. For specific routes, refer to the Family-friendly hikes in Old Saint Hilary'S Open Space Preserve guide.
The John Thomas Howell Wildflower Preserve, located near the historic church, is particularly notable for its wide variety of wildflowers. These typically bloom in spring, with the endangered Tiburon jewelflower appearing from mid-May to mid-June.
The unique geology and freshwater springs create a distinct ecosystem that attracts various wildlife. Visitors may observe birds such as American kestrels, red-tailed hawks, and northern harriers.
Old Saint Hilary'S Open Space Preserve is a popular destination on komoot, with more than 100,000 visitors having shared their experiences. The preserve's routes have an average rating of 4.76 out of 5 stars from over 3,500 ratings.
Yes, joggers can utilize the fire roads for off-road running. A dedicated guide for running trails is available: Running Trails in Old Saint Hilary'S Open Space Preserve.
For those looking to access the preserve via public transport, a komoot guide is available. This guide provides information on routes starting from bus stations: Hikes from bus stations in Old Saint Hilary'S Open Space Preserve.
Old Saint Hilary'S Open Space Preserve is managed by Marin County Parks. The official web page is on the Marin County Parks website. For general inquiries, Marin County Parks can be contacted at 415-473-6387.

