Contra Loma Regional Park

Park

Plan with 10 source-backed facts, 2 related records, and explicit uncertainty.

At a glance

Facility access status
Causes
  • water quality
  • maintenance challenges
Facility
Contra Loma Swim Lagoon
Status
closed
Trail access status
Cause
storm damage
Segment
Lake View Trail at the cattle pond
Source updated on
2026-09-22
Status
partially closed

Plan a visit

Requirements and current conditions

Facility access status

Recorded for: Contra Loma Regional Park

Causes
  • water quality
  • maintenance challenges
Facility
Contra Loma Swim Lagoon
Status
closed
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Trail access status

Recorded for: Contra Loma Regional Park

Cause
storm damage
Segment
Lake View Trail at the cattle pond
Source updated on
2026-09-22
Status
partially closed
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Routes and geography

Route connection

Recorded for: Contra Loma Regional Park

Connects to
park-black-diamond-mines-regional-preserve
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Facilities and services

Facility profile

Recorded for: Contra Loma Regional Park

South fishing dock access
paved trail
Wheelchair accessible
  • restrooms
  • drinking fountains
  • parking
  • south fishing dock
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Watercraft rule

Recorded for: Contra Loma Regional Park

Boat bands cross lake valid
No
Quarantine days from other ebrpd waterbodies
30
Same lake return exception
intact lake-specific boat band
Trigger
launch at Contra Loma or Del Valle
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

More planning facts

Managed land boundary geometry

Recorded for: Contra Loma Regional Park

Boundary geometry snapshot
Feature ids
  • ebrpd:37
Path
geometry/v0/snapshots/ebrpd-managed-land-boundaries-20260924.geojson
Sha256
4e6558956f4f397816d719ff87554289e08dd495314b2d57c83d1634f083e3e5
Boundary type
managed land status polygons
Coordinate precision decimal degrees
5
Coordinate reference system
EPSG:4326
Navigation grade
No
Evidence and sources (1)

No claim effective interval recorded.

No claim spatial scope recorded.

  1. Evidence stance: supports · Evidence details

    Evidence notes: Supports the selected source polygons and their retained boundary semantics.

    EBRPD's open-data layer reports the selected current managed-land polygons; parkland and landbank status remain separate.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-24T22:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • geometry/v0/snapshots/ebrpd-managed-land-boundaries-20260924.geojson

    References are not a confirmation of current availability.

Recreation rule

Recorded for: Contra Loma Regional Park

Activity
alcohol possession or consumption
Permitted
No
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Recreation rule

Recorded for: Contra Loma Regional Park

District daily fishing permit required
Yes
Purchase location
park entry kiosk
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Recreation rule

Recorded for: Contra Loma Regional Park

Dry kayaks
Rollovers or body contact activity permitted
No
Float tubes
Purpose
eliminate body contact
Waders or wetsuit required
Yes
Self bailing sea kayaks
Minimum clothing
short wetsuit
Pre entry shower required
Yes
Windsurfers and paddleboarders
Minimum clothing
short wetsuit
Pre entry shower minutes
2
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Official park guidance; current conditions require a pre-trip recheck.

    The live official park page publishes the water-body conditions, water-contact rules, recreation requirements, accessibility, access points, and closures represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T20:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Current notices
    • To Reach The Park
    • Park Accessibility
    • Attractions

    References are not a confirmation of current availability.

Visitor profile

Recorded for: Contra Loma Regional Park

Access
  • Frederickson Lane main entrance
  • swim lagoon
  • boat launch
  • ADA fishing dock
  • three walk-in entrances
Accessible facilities
  • restrooms
  • drinking fountains
  • parking
  • south fishing dock by paved trail
  • picnic areas
  • pool lift
  • loaner beach wheelchair
Acreage
775
Activities
  • boating
  • fishing
  • hiking
  • kid-friendly
  • picnicking
Address
1200 Frederickson Lane, Antioch, CA 94509
Alcohol allowed
No
Bus fee usd
25
Current alerts
As of
2026-09-20
Blue green algae
no advisory posted
Golden mussels
detected; boats launched here are quarantined 30 days from other inspected lakes
Lake view trail
closed at cattle pond due to storm damage
Fishing
District fishing permit required
Yes
Parking fee usd
5
Reservoir acres
80
Seasonal hours
opening varies from 06:00 to 07:00 and closing from 17:30 to 20:30 by month
Swim lagoon
closed for water-quality and maintenance challenges
Trail connection
Black Diamond Mines Regional Preserve
Trailered vehicle fee usd
5
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-contra-loma-regional-park

  1. Evidence stance: supports · Evidence details

    Evidence notes: Direct transcription and conservative structuring of planning-relevant fields from the official park page.

    The live park page publishes the visitor profile represented by the associated claim, including access, operating information, facilities, and material restrictions.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-20T07:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Overview
    • To Reach The Park
    • Attractions

    References are not a confirmation of current availability.

Explore related places

Routes and related places (2)

Before you go

No direct knowledge gap is linked to this entity. That does not mean the record is complete.

Sources, evidence, and history

Planning facts above are readable first. Open these records when you need to audit a source or see when knowledge changed.

Evidence for 10 published claims
Published ChangeSet history

Canonical data is historical evidence, not a guarantee of current conditions. Recheck volatile facts before travel.