Observation

observation · observation-ebrpd-quarry-lakes-water-rules-20260922

Claims and evidence

Access profile

Access mode
walk-in
Latitude
37.5682039954863
Longitude
-121.989825313633
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-entrance-quarry-alameda-creek-east-walk-in

  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.

Access profile

Access mode
walk-in
Latitude
37.5670316387681
Longitude
-122.001249679352
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-entrance-quarry-alameda-creek-west-walk-in

  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.

Access profile

Access mode
facility
Latitude
37.5780556
Longitude
-122.007
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-facility-quarry-ada-fishing-pier

  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.

Access profile

Access mode
facility
Latitude
37.5773333
Longitude
-122.0065833
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-facility-quarry-boat-launch

  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.

Access profile

Access mode
facility
Latitude
37.5798333
Longitude
-122.0042778
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-facility-quarry-niles-beach

  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.

Water quality status

Hazard
blue-green algae
Status
danger advisory
Water contact rule
swimming restricted to Niles Swim Beach ropes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-quarry-horseshoe-lake

  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.

Water quality status

Hazard
blue-green algae
Status
caution advisory
Water contact rule
swimming and water contact not permitted
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-quarry-lago-los-osos

  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.

Accessibility profile

Beach wheelchair
Assistant required
Yes
Availability
first-come, first-served
Cost
free
Water entry permitted
No
Rock picnic area parking
No
Wheelchair accessible
  • Horseshoe Lake fishing pier
  • Niles Beach facilities
  • Ensenada Pavilion area
  • Orchard picnic area
  • Rock picnic area bathrooms and drinking fountain
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-quarry-lakes-regional-recreation-area

  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

Mandatory inspection
Yes
Purpose
prevent invasive mussels
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-quarry-lakes-regional-recreation-area

  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.

Water quality status

Hazard
blue-green algae
Status
caution advisory
Water contact rule
swimming never allowed
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-quarry-rainbow-lake

  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.

Water quality status

Hazard
blue-green algae
Status
caution advisory
Water contact rule
swimming never allowed
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-quarry-shinn-pond

  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.

Recorded observations

Browse observations separately (1)

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.

Published record history

History lists published operations; it does not reconstruct removed content or confirm that external media remains available.

JSON

Historical evidence is not a guarantee of current conditions.