Park

Old Mill Park park

California, USA San Francisco Bay watershed 37.904°, -122.553°
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Nearby campgrounds
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Old Mill Park -- California park
Old Mill Park California · San Francisco Bay watershed
About this park

Old Mill Park

Old Mill Park is a beautiful and historic park located in the town of Mill Valley, California. There are several reasons why visitors should consider visiting the park, including its picturesque nature, rich history, and numerous hiking trails. The park's main attraction is the Old Mill, which was built in 1836 and is one of the oldest standing structures in Marin County. Visitors can take a self-guided tour of the mill, learn about the area's history, and explore the nearby hiking trails.

Other points of interest in the park include the Dipsea Trail, the Cascade Falls Trail, and the Muir Woods National Monument. The Dipsea Trail is a challenging hike that runs through the park and offers stunning views of the surrounding area. The Cascade Falls Trail is a more leisurely hike that leads to a beautiful waterfall. The Muir Woods National Monument is a nearby attraction that features towering redwood trees and hiking trails.

Interesting facts about the area include the fact that the Old Mill was once used to grind wheat and corn for the local community, and that the park was a popular spot for picnics and gatherings in the early 20th century. The area is also known for its role in the logging industry, with many of the trees in the park being used to build ships during World War II.

The best time of year to visit Old Mill Park is in the spring or fall, when the weather is mild and the park is less crowded. The park is open year-round, but visitors should be aware that parking can be limited during peak season.

Overall, Old Mill Park is a must-visit destination for anyone interested in hiking, history, or nature. Its rich history, stunning scenery, and numerous hiking trails make it a popular attraction for visitors to California.
StateCalifornia
WatershedSan Francisco Bay
Latitude37.9042°
Longitude-122.5527°
Land designation

Park & land designation reference

A quick legend for the federal and state land categories Snoflo tracks. Each designation comes with different rules around access, recreation, and resource extraction.

National Park
Large protected natural areas managed by the federal government to preserve significant landscapes, ecosystems, and cultural resources; recreation is allowed but conservation is the priority.
State Park
Public natural or recreational areas managed by a state government, typically smaller than national parks and focused on regional natural features, recreation, and education.
Local Park
Community-level parks managed by cities or counties, emphasizing recreation, playgrounds, sports, and green space close to populated areas.
Wilderness Area
The highest level of land protection in the U.S.; designated areas where nature is left essentially untouched, with no roads, structures, or motorized motorized access permitted.
National Recreation Area
Areas set aside primarily for outdoor recreation (boating, hiking, fishing, often around reservoirs, rivers, or scenic landscapes); may allow more development.
National Conservation Area (BLM)
BLM-managed areas with special ecological, cultural, or scientific value; more protection than typical BLM land but less strict than Wilderness Areas.
State Forest
State-managed forests focused on habitat, watershed, recreation, and sustainable timber harvest.
Bureau of Land Management (BLM) Land
Vast federal lands managed for mixed use -- recreation, grazing, mining, conservation -- with fewer restrictions than national parks or forests.
Detailed forecast

Plan your visit down to the hour

Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Stay nearby

Area campgrounds

Snoflo-tracked campgrounds within reach of Old Mill Park, with reservations status.

Campground Reservations Toilets View
Bootjack Campground
Free Campground
Pantoll Campground
Haypress Campground
Marin Park Rv
Hawk Camp Campground

Responsible recreation & Leave No Trace

Know before you go
Check the operator's site for hours, permit requirements, seasonal closures, and fire restrictions before heading out.
Stay on trail
Stick to marked paths to protect vegetation, prevent erosion, and avoid disturbing wildlife habitat.
Respect wildlife
Observe from a distance, never feed wildlife, and store food securely if camping is permitted on-site.
Pack it in, pack it out
Carry out all trash, food scraps, and gear. Many parks have limited or no trash service.
Leave what you find
Don't take rocks, plants, or artifacts. They make the park what it is for the next visitor.

Set push alerts in the Snoflo app

Save Old Mill Park as a favorite, set a custom threshold (precipitation, freezing temperatures, fire-restriction days), and the iOS app will push the moment conditions cross.

FAQ

About Old Mill Park

What can I do at Old Mill Park?

Most Snoflo-tracked parks support hiking, picnicking, and wildlife viewing. Check the operator's site for activity-specific rules (camping, fishing, paddling, hunting).

How fresh is the weather data?

The hourly forecast updates throughout the day from NOAA / yr.no. Streamflow comes live from USGS streamgauges.

When is the best time to visit?

Use the 15-day temperature & precipitation outlook on this page to plan -- pick a window with comfortable temperatures and low precipitation.

How do I get to Old Mill Park?

Tap Directions in the hero above to open driving directions in Google Maps, or Open in map to center the Snoflo interactive map on the park.

Can I get alerts when conditions change?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this park, set a threshold (temperature, precipitation), and you'll get a push the moment it crosses.

More parks

Other parks near here

Snoflo-tracked parks within driving distance of Old Mill Park.