What fish are at Cucamonga Guasti Park Lake?

Fishing Cucamonga Guasti Park Lake is most likely to be for Mixed Trout. All 8 plants on record are Mixed Trout. Mixed Trout was last stocked March 1, 2026. Rainbow Trout (Per CDFW's 2026 Provisional Stocking Plan for this water (a planning document, not a confirmed release)) is recorded here outside the stocking reports.

Cucamonga Guasti Park Lake fishing

Fishing at Cucamonga Guasti Park Lake is on a community pond, stocked with Mixed Trout and Rainbow Trout. It is stocked about 4 times a year since 2025, most often in January and November. Species guides list dawn and dusk as the active times.

Last stocked

March 1, 2026

Plants on record

Species recorded

Elevation

1,001 ft

Common questions

What fish are at Cucamonga Guasti Park Lake?: Fishing Cucamonga Guasti Park Lake is most likely to be for Mixed Trout. All 8 plants on record are Mixed Trout. Mixed Trout was last stocked March 1, 2026. Rainbow Trout (Per CDFW's 2026 Provisional Stocking Plan for this water (a planning document, not a confirmed release)) is recorded here outside the stocking reports.
When is Cucamonga Guasti Park Lake stocked?: Last stocked March 1, 2026. It is stocked about 4 times a year since 2025, most often in January and November.
How do you get on Cucamonga Guasti Park Lake?: Shore fishing is available. The nearest town is Ontario, CA. Cucamonga-Guasti Regional Park covers 150 acres at 800 N Archibald Ave in Ontario and holds two lakes open to fishing.
Which lakes near Cucamonga Guasti Park Lake were stocked more recently?: Puddingstone Lake (12.3 mi) and Santa Fe Reservoir (20.8 mi) were stocked more recently. Puddingstone Lake is also stocked with Mixed Trout and Santa Fe Reservoir is also stocked with Mixed Trout.

Access and facts

Water type: community pond
Nearest town: Ontario, CA
Shore access: Yes

Cucamonga-Guasti Regional Park covers 150 acres at 800 N Archibald Ave in Ontario and holds two lakes open to fishing.

Sources: parks.sbcounty.gov, accessed September 23, 2026 , parks.sbcounty.gov, accessed September 23, 2026 , parks.sbcounty.gov, accessed September 23, 2026

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How Cucamonga Guasti Park Lake is stocked

Puddingstone Lake (12.3 mi) and Santa Fe Reservoir (20.8 mi) were stocked more recently. Puddingstone Lake is also stocked with Mixed Trout and Santa Fe Reservoir is also stocked with Mixed Trout.

Fish at Cucamonga Guasti Park Lake

Fishing Cucamonga Guasti Park Lake is most likely to be for Mixed Trout. All 8 plants on record are Mixed Trout.

Mixed Trout 8 plants

Plants: 8 of 8
Last stocked: March 1, 2026

Stocking history

Source: California Department of Fish and Wildlife.
Date	Species	Quantity	Avg. length	Source
March 1, 2026	Mixed Trout	–	–	report
February 15, 2026	Mixed Trout	–	–	report
January 18, 2026	Mixed Trout	–	–	report
January 4, 2026	Mixed Trout	–	–	report
December 21, 2025	Mixed Trout	–	–	report
December 7, 2025	Mixed Trout	–	–	report
November 23, 2025	Mixed Trout	–	–	report
November 9, 2025	Mixed Trout	–	–	report

Species found here

Confirmed present independent of the stocking records above, not from a stocking event.

Rainbow Trout : Per CDFW's 2026 Provisional Stocking Plan for this water (a planning document, not a confirmed release). (nrm.dfg.ca.gov, accessed September 23, 2026)

Species stocked here

Mixed Trout (8)

Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.