RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Upper Ouse

Largest measured brown / sea trout: 54.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Upper Ouse was 54.3 cm, recorded at Old Mill House Buckingham on 24 June 1988.

Across 432 measured brown / sea trout, the median measured length was 20.2 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Upper Ouse.

See brown / sea trout records across England →

Most recent observation3 June 2025Buckingham · 2 fish
Largest measured brown / sea trout
54.3 cm
Median length
20.2 cm
Fish measured
432
Survey locations
11

Individual EA measurements

Largest measured brown / sea trout

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
54.3 cm24 Jun 1988Old Mill House Buckingham28817
52.1 cm3 Oct 2016Buckingham149786
51.8 cm8 Sept 2016Water Stratford149280
49.3 cm8 Sept 2016Water Stratford149280
46.5 cm9 Jul 2024Westbury165551
45.3 cm4 Apr 1997Water Stratford28863
45.3 cm4 Apr 1997Water Stratford28863
44.1 cm5 Sept 2016Brackley149158
43.3 cm4 Apr 1997Water Stratford28863
43.3 cm4 Apr 1997Water Stratford28863

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where brown / sea trout were found

Each point marks a survey location with at least one brown / sea trout record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding brown / sea trout
Buckingham28 Apr 20043 Jun 20255
Westbury25 Mar 19979 Jul 20245
Water Stratford21 Jun 19885 Jun 20248
Brackley30 Sept 20084 Jun 20247
Manor Farm Cosgrove31 Oct 201631 Oct 20161
Passenham13 May 200913 May 20091
Whitfield1 Oct 20081 Oct 20081
Turweston1 Oct 20081 Oct 20081
Haversham Weir28 Apr 199428 Apr 19941
Old Mill House Buckingham24 Jun 198824 Jun 19881
Radclive Mill22 Jun 198822 Jun 19881

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1988–2025

Survey records by year

Each bar shows how many survey visits recorded brown / sea trout that year.

Fish measured by surveyors

Measured length distribution

See how the 432 measured fish were spread across different length ranges.

Smallest
6.1 cm
Lower quarter
14.3 cm
Median
20.2 cm
Upper quarter
26.5 cm
Largest
54.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Upper Ouse

Compare other species with enough survey and measurement data for a detailed page.

Pike Perch Dace Roach Chub Gudgeon

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →