RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Gwash

Largest measured brown / sea trout: 48 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Gwash was 48 cm, recorded at Church bridge - u/s Empingham on 16 March 1990.

Across 6,299 measured brown / sea trout, the median measured length was 20.8 cm.

Surveyors recorded weights for 5 brown / sea trout. The median was 6.3 oz (0.18 kg) and the largest recorded weight was 9.1 oz (0.258 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 Gwash.

See brown / sea trout records across England →

Most recent observation17 August 2023Foundry Road · 6 fish
Largest measured brown / sea trout
48 cm
Median length
20.8 cm
Fish measured
6,299
Survey locations
17

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
48 cm16 Mar 1990Church bridge - u/s Empingham54497
43.7 cm26 Nov 2007Friths Farm108688
43.4 cm26 Nov 2007Upstream White Post Bridge108691
42 cm3 Mar 1993Shacklewell Lodge Ingthorpe54514
41.5 cm24 Jun 2013Belmesthorpe Meadow137453
41 cm15 Mar 1993Newstead Mill54521
41 cm10 Mar 1993Little Casterton54516
40.9 cm13 May 2015Upstream White Post Bridge144786
40 cm10 Mar 1993Little Casterton54516
40 cm10 Mar 1993Little Casterton54516

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
Foundry Road13 Mar 199017 Aug 202313
Upstream White Post Bridge12 Mar 199015 Aug 202315
Church bridge - u/s Empingham16 Mar 199013 Sept 201911
Flow Project - Upstream Gt. Casterton STW15 May 201512 Sept 20184
Belmesthorpe Meadow12 Mar 19907 Sept 201810
Flow Project - DS Great Casterton STW15 May 20152 Nov 20152
Great Casterton14 Mar 199018 Jun 20156
Upstream Ryhall STW - Flow project Site14 May 201514 May 20151
Downstream Ryhall STW Flow project site14 May 201514 May 20151
Ingthorpe1 Aug 200616 Jun 20145
Downstream North Brook15 Mar 199026 Jun 20132
Downstream Ingthorpe Road Bridge14 Mar 199025 Jun 20134
Shacklewell Lodge Ingthorpe26 Mar 199017 May 20123
Little Casterton15 Mar 19905 Jul 20115
Friths Farm13 Mar 19905 Jul 20116
Tolethorpe2 Aug 20062 Aug 20061
Newstead Mill19 Mar 199015 Mar 19932

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

1990–2023

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 6,299 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
17 cm
Median
20.8 cm
Upper quarter
24.3 cm
Largest
48 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 5 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
5.1 oz (0.146 kg)
Median
6.3 oz (0.18 kg)
Upper quarter
6.7 oz (0.19 kg)
Heaviest
9.1 oz (0.258 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 Gwash

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

European eel Bullhead Grayling Dace Roach 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 →