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San Gabriel Mountains National Monument

San Dimas Reservoir

Highlight • Lake

San Dimas Reservoir

Road cycling

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San Dimas Reservoir is a significant flood control and water conservation facility nestled within the scenic San Gabriel Mountains in Los Angeles County, California. Situated at an elevation of approximately 500 meters (1,640 feet) within the Angeles National Forest, this reservoir is primarily known for its functional role rather than as a traditional recreational lake. It is fed by San Dimas Creek, a major drainage from the San Gabriel Mountains that flows into the San Gabriel River, and is a…

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Angeles National Forest

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    February 10, 2024

    Road cycling

    The Los Angeles County Department of Public Works currently operates the San Dimas Dam, a concrete gravity dam within the San Gabriel Mountains. It was built by the Los Angeles County Flood Control District in 1922, and today it stores water only after substantial winter storms and diverts floodwaters from San Dimas Wash to Puddingstone Reservoir.

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    Nearby routes

    Best routes near San Dimas Reservoir

    24

    riders

    #1.

    San Dimas Reservoir loop from Auto Club Speedway

    67.9km

    02:58

    570m

    570m

    Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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    Moderate

    5.0

    (1)

    12

    riders

    Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

    Moderate

    Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

    Easy

    Details

    Informations

    Elevation 500 m

    Weather

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    Sunday 29 March

    31°C

    17°C

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    Max wind speed: 11.0 km/h

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    Location: San Gabriel Mountains National Monument, Los Angeles County, California, United States

    Frequently Asked Questions

    Are there dedicated hiking trails directly around San Dimas Reservoir?

    No, there are no specific trails that loop directly around the San Dimas Reservoir itself. As a functional flood control basin, direct public access to the shoreline for recreational hiking is challenging and not easily maintained. The reservoir is often dry, further limiting traditional lakeside trail experiences.

    Where can I find hiking or running routes near San Dimas Reservoir?

    While the reservoir itself has limited recreational access, the surrounding region offers numerous opportunities. You can find extensive trails for hiking, mountain biking, and horseback riding in the nearby Frank G. Bonelli Regional Park, which is home to Puddingstone Reservoir. The broader Angeles National Forest also provides a variety of hiking options for different skill levels.

    Is San Dimas Reservoir suitable for family outings or hiking with kids?

    San Dimas Reservoir itself is not ideal for family outings or hiking with kids due to limited direct access and recreational facilities. However, the nearby Frank G. Bonelli Regional Park offers a family-friendly environment with playgrounds, picnic areas, and easier trails suitable for children, along with various water activities at Puddingstone Reservoir.

    Are dogs allowed on trails near San Dimas Reservoir?

    While direct access to San Dimas Reservoir is limited, dogs are generally permitted on leash in many areas of the surrounding Angeles National Forest and Frank G. Bonelli Regional Park. Always check specific trail regulations and signage before heading out, as rules can vary by location within these larger recreational areas.

    What are the parking options for visiting the San Dimas Reservoir area?

    Parking directly at the San Dimas Reservoir is primarily for operational purposes and not designed for public recreational access. For those looking to explore the vicinity, parking is available at nearby recreational areas such as Frank G. Bonelli Regional Park, which offers multiple parking lots for access to its trails and facilities.

    Are there any permits or fees required to visit San Dimas Reservoir or nearby areas?

    Visiting the San Dimas Reservoir itself typically does not require permits, but public access is restricted. If you plan to visit the nearby Frank G. Bonelli Regional Park, there may be parking fees, especially on weekends or holidays. Always check the official park website for the most current information on fees and any specific permits required for certain activities.

    When is the best time of year to visit the San Dimas Reservoir area for outdoor activities?

    The best time to visit the general area around San Dimas Reservoir for outdoor activities is during the cooler, drier months, typically from late fall to early spring. Temperatures are more moderate during this period, making it more comfortable for hiking, biking, and other outdoor pursuits in the San Gabriel Mountains.

    What kind of wildlife can be spotted near San Dimas Reservoir?

    While the reservoir itself is often dry, the surrounding natural areas within the Angeles National Forest and San Gabriel Mountains are home to various wildlife. Hikers might spot common birds, rabbits, squirrels, and occasionally larger mammals like deer. Keep an eye out for local bird species, especially near any water sources or in the chaparral vegetation.

    Are there any accessible paths or facilities for visitors with mobility challenges?

    Direct access to San Dimas Reservoir is not designed with accessible paths for visitors with mobility challenges. However, the nearby Frank G. Bonelli Regional Park offers some paved paths and accessible facilities. It's advisable to check the park's official resources for specific information on accessible trails and amenities before your visit.

    Can I find cafes, restaurants, or hotels near San Dimas Reservoir?

    There are no cafes, restaurants, or hotels directly at San Dimas Reservoir. However, the nearby cities of San Dimas, La Verne, and Claremont offer a wide range of dining options and accommodations. These cities are just a short drive away and provide all the amenities visitors might need.

    What are the main points of interest or viewpoints in the San Dimas Reservoir area?

    The primary point of interest at San Dimas Reservoir is the impressive San Dimas Dam, a concrete gravity dam built in 1922, which is a significant engineering marvel for flood control. While there aren't traditional scenic viewpoints for the reservoir itself, the surrounding San Gabriel Mountains offer numerous vistas. For more recreational points of interest, the adjacent Frank G. Bonelli Regional Park and Puddingstone Reservoir provide various attractions.

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