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  • Arroyo Seco Content BAnner

Department of Public Works

  • Hahamongna Watershed Park

    What is Hahamongna Watershed Park?

    Hahamongna Watershed Park is a 300 acre park which provides a transition from the urban land uses in Pasadena and its neighboring foothill communities to the vast open space areas of the Angeles National Forest. Here, one can find an interconnected system of hiking trails, prime oak woodland, picnic facilities, restrooms, equestrian gathering areas, a multi-purpose playing field, and the world’s first disc golf course. The flood basin behind Devil’s Gate Dam supports water conservation, a rich diversity of plant habitat, and a refuge for numerous wildlife and bird species.

    The eastern edge of the park contains an interconnected system of hiking trails, a series of active spreading basins that greatly contribute to the city’s water conservation mission, as well as the Jet Propulsion Laboratory (JPL) parking lots. Bicycle riding in the park is permitted on the various paved routes throughout the park but not on the hiking trails.

    The western portion of the Hahamongna Watershed Park area contains the Oak Grove area. The Oak Grove area is characterized by prime oak woodland, a hiking trail system, various picnic areas, a multi-purpose playing field, rest rooms and the world’s first disc golf course. It can be summarized that Hahamongna Watershed Park contains a blend of passive recreation uses, water conservation, and flood management activities blended with diverse plant and animal habitat.

    What additional recreational opportunities are there in Hahamongna Watershed Park?

    • Cyclists are welcome on paved paths and roads throughout the Arroyo Seco
    •  Equestrian staging facilities are located in Hahamongna Watershed Park.
    • One  Multipurpose Field  is available in Hahamongna Watershed Park. Field is booked by reservation; information available from the Human Services and Recreation Park Reservation Desk, or by calling (626) 744-7195.
    • Oak Grove Disc Golf Course is an 18-hole course open daily sunrise to sunset.
    • Picnic Areas are offered throughout Hahamongna Watershed Park. Group picnic areas are available by reservation; information available from the Human Services and Recreation Park Reservation Desk, or by calling (626) 744-7195.
    • The Arroyo Seco boasts over 22 miles of trails. Hahamongna Watershed Park is a great launching point for a trail adventure providing access to four regional trailheads.

    When is Hahamongna Watershed Park open?

    Hahamongna Watershed Park is open daily from sunrise to sunset.

    Where is Hahamongna Watershed Park in the Arroyo Seco?

    Hahamongna Watershed Park is located at the base of Arroyo Seco Canyon, north of Devil's Gate Dam.  The main entrance Hahamongna Watershed Park is located off Oak Grove Dr.

    Are there local organizations & groups providing activities in Hahamongna?

    Equestrian events are available through Rose Bowl Riders in Hahamongna Watershed Park.

    Therapeutic equine assisted activities for disabled riders are offered through MACH 1 (Move A Child Higher). MACH 1 is based in the Hahamongna Watershed Park.

    Summer day camping and youth services are offered through Tom Sawyer Camps, seasonally located in Hahamongna Watershed Park.

    Recreation, restoration, and conservation events are hosted year round in the Arroyo by organizations and groups.

    • Arroyo Seco Foundation
    • Sierra Club, Angeles Chapter Pasadena Group
    • Pasadena Audubon Society

    Who can I contact to reserve a facility in Hahamongna Watershed Park?

    Information on facility reservations is available through the City of Pasadena’s Human Services and Recreation Department.

  • Directions to Arroyo Seco Natural Park

    Located on the western side of Pasadena near CA-134 & I-210 freeways, many roads lead to the Arroyo Seco Natural Park. Three main entrances provide automobile access to the park and numerous trails along the eastern and western edges of the park provide additional access from neighborhoods and surrounding communities.

    Directions to Arroyo Seco Natural Park provided by GoogleMaps