Brown / sea trout · Salmo trutta

Brown / sea trout in the Cogwell Brook

Largest measured brown / sea trout: 28 cm

The largest brown / sea trout measured in Environment Agency surveys of the Cogwell Brook was 28 cm, recorded at W049n on 14 July 1992.

Across 89 measured brown / sea trout, the median measured length was 8.6 cm.

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

See brown / sea trout records across England →

Most recent observation21 August 2025W049n · 9 fish

Largest measured brown / sea trout: 28 cm
Median length: 8.6 cm
Fish measured: 89
Survey locations: 2

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.

Length	Survey date	Survey location	Survey ID
28 cm	14 Jul 1992	W049n	89715
26.5 cm	13 Sept 2013	W049n	138713
26.5 cm	13 Sept 2013	W049n	138713
25.5 cm	13 Sept 2013	W049n	138713
24.8 cm	28 Jun 2019	W049n	155112
24 cm	13 Sept 2013	W049n	138713
23 cm	13 Sept 2013	W049n	138713
22.4 cm	13 Sept 2013	W049n	138713
22 cm	13 Sept 2013	W049n	138713
21.9 cm	13 Sept 2013	W049n	138713

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 surveyed	First recorded	Last recorded	Visits finding brown / sea trout
W049n	14 Jul 1992	21 Aug 2025	4
W171L	11 Jul 2003	11 Jul 2003	1

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

1992–2025

Survey records by year

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

192

093

094

095

096

097

098

099

000

001

002

103

004

005

006

007

008

009

010

011

012

113

014

015

016

017

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 89 measured fish were spread across different length ranges.

Smallest: 5.6 cm
Lower quarter: 7.9 cm
Median: 8.6 cm
Upper quarter: 16.8 cm
Largest: 28 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cogwell Brook

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

Bullhead

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 →