RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Allen (East & West)

Largest measured brown / sea trout: 58.5 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Allen (East & West) was 58.5 cm, recorded at River east Allen at Catton Bridge on 12 July 2009.

Across 4,129 measured brown / sea trout, the median measured length was 9.5 cm.

Surveyors recorded weights for 290 brown / sea trout. The median was 1 oz (0.028 kg) and the largest recorded weight was 3.3 oz (0.0925 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 Allen (East & West).

See brown / sea trout records across England →

Most recent observation3 July 2025River east Allen at Catton Bridge · 679 fish
Largest measured brown / sea trout
58.5 cm
Median length
9.5 cm
Fish measured
4,129
Survey locations
33

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
58.5 cm12 Jul 2009River east Allen at Catton Bridge120980
55.6 cm12 Jul 2009River east Allen at Catton Bridge120980
52.5 cm25 Jul 2024River east Allen at Catton Bridge167552
50.2 cm29 Jul 2012River east Allen at Catton Bridge132565
47.7 cm29 Jul 2012River east Allen at Catton Bridge132565
45.9 cm25 Jul 2024River east Allen at Catton Bridge167552
44.3 cm29 Jul 2012River east Allen at Catton Bridge132565
44.3 cm29 Jul 2012River east Allen at Catton Bridge132565
41.5 cm25 Jul 2024River east Allen at Catton Bridge167552
41 cm25 Jul 2024River east Allen at Catton Bridge167552

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
River east Allen at Catton Bridge4 Sept 19953 Jul 202514
River Allen at Ridley Hall30 Jul 200725 Jul 202410
Mohope Burn7 Sept 20059 Sept 20234
River West Allen at Corryhill5 Sept 19951 Sept 20235
Kingswood Burn26 Sept 20051 Sept 20234
Carrs Burn21 Sept 20051 Sept 20236
Blaeberry Burn12 Oct 20041 Sept 20234
Oakeydene Burn26 Sept 200530 Aug 20234
Swinhope Burn at Burnmouth21 Sept 200529 Aug 20234
Knockshield Burn9 Sept 200529 Aug 20233
East Allen at Peasmeadows19 Jul 199629 Aug 20238
Barney crag downstream11 Aug 20178 Sept 20193
West Allen at ninebanks6 Aug 20023 Sept 201911
Mohope Burn New Site3 Sept 20193 Sept 20191
Barney crag upstream11 Aug 20173 Sept 20193
River East Allen at Sinderhope30 Aug 200524 Jul 20143
Church Burn 212 Oct 200423 Jul 20143
River West Allen at Black Cleugh8 Aug 20055 Sept 20112
Mohope Burn 28 Oct 20068 Oct 20061
Sipton Burn26 Sept 200526 Sept 20051
River East Allen at Allenheads 126 Sept 200526 Sept 20051
River Allen at Plankey Mill27 Jul 199512 Sept 20052
Church Burn7 Sept 20057 Sept 20051
Byerhope Burn31 Aug 200531 Aug 20051
Blaeberry Burn 231 Aug 200531 Aug 20051
River east Allen at Wide Eals30 Aug 200530 Aug 20051
River East Allen at Tedham30 Aug 200530 Aug 20051
Whitewalls Burn11 Aug 200511 Aug 20051
Middlehope Burn Slaghill11 Aug 200511 Aug 20051
River West Allen at Parmentley Hall8 Aug 20058 Aug 20051
River East Allen at Allenheads 319 Jul 199719 Jul 19971
River East Allen at Allenheads 419 Jul 199619 Jul 19961
River East Allen at Allenheads 219 Jul 199619 Jul 19961

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

1995–2025

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 4,129 measured fish were spread across different length ranges.

Smallest
3.4 cm
Lower quarter
6.3 cm
Median
9.5 cm
Upper quarter
13.2 cm
Largest
58.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 290 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.0005 kg)
Lower quarter
0.6 oz (0.017 kg)
Median
1 oz (0.028 kg)
Upper quarter
1.4 oz (0.0402 kg)
Heaviest
3.3 oz (0.0925 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 Allen (East & West)

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

Stone loach European eel Atlantic salmon Minnow

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 →