Brown / sea trout · Salmo trutta

Brown / sea trout in the River Lostock

Largest measured brown / sea trout: 47 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Lostock was 47 cm, recorded at Whins Lane u/s Copthurst on 13 July 2004.

Across 328 measured brown / sea trout, the median measured length was 14.8 cm.

Surveyors recorded one individual weight: 15.9 oz (0.45 kg).

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

See brown / sea trout records across England →

Most recent observation5 July 2023Cowling lane · 1 fish

Largest measured brown / sea trout: 47 cm
Median length: 14.8 cm
Fish measured: 328
Survey locations: 8

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
47 cm	13 Jul 2004	Whins Lane u/s Copthurst	83360
46.9 cm	7 Jul 2011	Havelock Road	126922
46.9 cm	5 Jul 2011	Lower Copthurst	126925
43.2 cm	7 Jul 2011	Havelock Road	126922
42.7 cm	5 Jul 2011	Lower Copthurst	126925
42 cm	14 Jun 2004	Lower Copthurst	83189
41.6 cm	24 Jun 2003	Lower Copthurst	77964
41.4 cm	14 Jun 2004	Lower Copthurst	83189
41.2 cm	6 Sept 2003	Lower Copthurst	77996
39.6 cm	16 Jun 2005	Lower Copthurst	88244

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
Cowling lane	5 Jul 2023	5 Jul 2023	1
Mill Lane	25 Jul 2018	25 Jul 2018	1
Havelock Road	8 Sept 2004	7 Jul 2011	3
Lower Copthurst	24 Jul 2000	5 Jul 2011	10
Sheep Hill Lane	25 Jun 2003	16 Aug 2006	4
Kem Mill Lane	21 Jun 2001	27 Jun 2006	8
Whins Lane u/s Copthurst	13 Jul 2004	13 Jul 2004	1
Sherdeley Road	18 Jun 2004	18 Jun 2004	1

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

2000–2023

Survey records by year

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

100

401

302

503

604

305

306

007

008

009

010

211

012

013

014

015

016

017

118

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 328 measured fish were spread across different length ranges.

Smallest: 5.2 cm
Lower quarter: 7.5 cm
Median: 14.8 cm
Upper quarter: 25.5 cm
Largest: 47 cm

0–99 mm

140

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 15.9 oz (0.45 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Lostock

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

European eel Chub Roach Gudgeon Dace Perch

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 →