Brown / sea trout · Salmo trutta

Brown / sea trout in the River Cocker

Largest measured brown / sea trout: 16.4 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Cocker was 16.4 cm, recorded at 1656.00 Tom Rudd Beck, River Cocker on 7 August 2023.

Across 265 measured brown / sea trout, the median measured length was 6.7 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 Cocker.

See brown / sea trout records across England →

Most recent observation7 August 20231659.53 Bitter Beck, River Cocker · 63 fish

Largest measured brown / sea trout: 16.4 cm
Median length: 6.7 cm
Fish measured: 265
Survey locations: 19

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
16.4 cm	7 Aug 2023	1656.00 Tom Rudd Beck, River Cocker	162967
15.3 cm	7 Aug 2023	1656.00 Tom Rudd Beck, River Cocker	162967
15.1 cm	7 Aug 2023	1656.00 Tom Rudd Beck, River Cocker	162967
14.6 cm	10 Jul 2023	1601.00 Honister Pass, Gaitsgarthdale Beck	162554
14.2 cm	7 Aug 2023	1656.00 Tom Rudd Beck, River Cocker	162967
14.2 cm	10 Jul 2023	1601.00 Honister Pass, Gaitsgarthdale Beck	162554
13.8 cm	7 Aug 2023	1659.53 Bitter Beck, River Cocker	162969
13.5 cm	8 Jul 2021	1666.00 Broughton Beck, River Derwent	160024
12.9 cm	7 Aug 2023	1659.53 Bitter Beck, River Cocker	162969
12.8 cm	7 Aug 2023	1656.00 Tom Rudd Beck, River Cocker	162967

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
1659.53 Bitter Beck, River Cocker	21 Jul 2006	7 Aug 2023	5
1656.00 Tom Rudd Beck, River Cocker	21 Jul 2006	7 Aug 2023	4
1601.00 Honister Pass, Gaitsgarthdale Beck	17 Jul 2006	10 Jul 2023	5
1666.00 Broughton Beck, River Derwent	26 Jul 2004	7 Jul 2023	4
1619.40 Sail Beck, River Cocker	18 Jul 2006	5 Sept 2013	2
1603.00 DS Buttermere, Buttermere Dubs	5 Sept 2013	5 Sept 2013	1
1615.50 DS Jubille Bridge d/s Footbridge	24 Jul 2013	24 Jul 2013	1
1611.10 Low Stanger Farm, River Cocker	10 Sept 2003	24 Jul 2013	5
1612.00 DS Southwaite Road Bridge, R Cocker	12 Sept 2001	23 Jul 2013	6
1609.80 High Rogerscale, River Cocker	6 Sept 2005	23 Jul 2013	4
1609.48 Nr Sewage Works, River Cocker	29 Sept 2009	23 Jul 2013	3
1609.12 DS Lorton Road Bridge, River Cocker	29 Sept 2009	23 Jul 2013	3
1607.00 Redhow, River Cocker	8 Sept 2003	23 Jul 2013	5
1606.50 Cornhow, River Cocker	8 Sept 2003	22 Jul 2013	6
1605.90 DS from weir at Scales car park, R Cocker	11 Sept 2001	22 Jul 2013	6
1605.00 DS Crummock Water, R Cocker	11 Sept 2001	22 Jul 2013	5
1615.00 DS of Jubilee Bridge, River Cocker	25 Sept 2001	30 Sept 2009	5
1609.50 Nr Sewage Treatment Works, R. Cocker	18 Sept 2003	19 Aug 2005	2
1609.10 DS Lorton road bridge, R Cocker	11 Sept 2001	19 Aug 2005	3

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

2001–2023

Survey records by year

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

501

002

903

104

905

606

107

008

1009

910

411

012

1213

014

015

116

317

018

019

020

121

022

423

Fish measured by surveyors

Measured length distribution

See how the 265 measured fish were spread across different length ranges.

Smallest: 4.5 cm
Lower quarter: 5.7 cm
Median: 6.7 cm
Upper quarter: 7.7 cm
Largest: 16.4 cm

0–99 mm

245

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cocker

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

Atlantic salmon European eel

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 →