New website by Stoa. Not the official Valley Water website.

Surface Water Data Portal

Demo snapshot · July 28, 2026 at 4:53 PM PT · not current conditions

Guadalupe watershed

Los Gatos Creek at Lark Ave

Reading 1.51 ft and 20.77 cfs. That is 2.49 feet below the first flood threshold.

Los Gatos Creek at Lark Ave plotted at latitude 37.2518 and longitude -121.9640 over Valley Water's published major-watershed layer.
Los Gatos Creek at Lark Ave at 37.2518, -121.9640, exactly as positioned in Valley Water's sensor feed. Guadalupe River is the published polygon whose name matches this portal group. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.
  • Stream gauge

1.51 ft

Captured July 28, 2026 at 4:30 PM PT

  • Sensor ID 5059
  • 37.2518, -121.9640
  • Included in Valley Water's flood watch
  • Reporting

What Floods at Each Level

These descriptions are Valley Water's own, quoted exactly as published for this gauge.

Threshold 1 · 4 ft (686 cfs)

2.49 ft above the current reading

Los Gatos Creek Trail may become inundated at various locations downstream of Vasona Dam.

Valley Water, threshold 1 description for Los Gatos Creek at Lark Ave

Threshold 2 · 8 ft (3,693 cfs)

6.49 ft above the current reading

Possible flooding to occur downstream of CA85 near Mozart Ave homes and office parks off Winchester Blvd.

Valley Water, threshold 2 description for Los Gatos Creek at Lark Ave

Threshold 3 · 10 ft (6,281 cfs)

8.49 ft above the current reading

Areas adjacent to Los Gatos Creek downstream of I-280 through downtown San Jose at risk. Refer to downstream gauges for additional information. 940 Lincoln Avenue and 1150 Pedro Street at risk.

Valley Water, threshold 3 description for Los Gatos Creek at Lark Ave

Places This Gauge Covers

Streets and landmarks named in the threshold descriptions above.

Upstream and Downstream

Where this gauge sits on Los Gatos Creek.

  1. Los Gatos Creek above Ryland Dam

    5.33 ft · 2.17 cfs · no published threshold

  2. Los Gatos Creek above Lexington Reservoir

    0.00 ft · 0 cfs · no published threshold

  3. Los Gatos Creek below Lexington Reservoir (Low Flow)

    2.18 ft · 0 cfs · no published threshold

  4. Los Gatos Creek below CA-9

    2.54 ft · 20 cfs · 4.96 ft below threshold 1

  5. Los Gatos Creek at Lark Ave

    1.51 ft · 20.77 cfs · 2.49 ft below threshold 1

  6. Los Gatos Creek at Kirk Dam Pond (Stage Only)

    9.32 ft · 0 cfs · no published threshold

  7. Los Gatos Creek below Kirk Dam

    1.19 ft · 6.65 cfs · no published threshold

  8. Los Gatos Creek at Lincoln Ave

    4.95 ft · 4.02 cfs · 5.05 ft below threshold 1

Sensor Notes

Record is considered good. Flow is extensively regulated by Vasona dam, which is approximately 1/8th of a mile upstream of station. VasonaÂ’s multiple gage spillway flow passes through the station.

Valley Water, sensor notes for Los Gatos Creek at Lark Ave