RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Aln

Largest measured brown / sea trout: 50 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Aln was 50 cm, recorded at Aln at Bridge End on 18 September 2012.

Across 9,364 measured brown / sea trout, the median measured length was 6.8 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 Aln.

See brown / sea trout records across England →

Most recent observation23 June 2026River Aln at Lady's Well · 21 fish
Largest measured brown / sea trout
50 cm
Median length
6.8 cm
Fish measured
9,364
Survey locations
39

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
50 cm18 Sept 2012Aln at Bridge End133645
49.5 cm7 Oct 2013River Aln at Old Hawkhill Ford139192
47.3 cm7 Oct 2013River Aln at Old Hawkhill Ford139192
36.8 cm12 Jul 2005River Aln at Lady's Well86705
30.7 cm4 Aug 2017River Aln at Bolton Mill151185
30.6 cm18 Sept 2012River Aln at Abberwick Mill.133646
29.6 cm18 Sept 2012Aln at Bridge End133645
28.4 cm14 Sept 2015Edlingham Burn at Battle Bridge146390
28 cm4 Aug 2017River Aln at Lady's Well151189
27.6 cm14 Sept 2012River Aln Upstream of Whittingham Ford133704

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 Aln at Lady's Well22 Sept 199323 Jun 202625
River Aln at Bolton Mill23 Sept 199323 Jun 202623
Eglingham Burn at Shipley16 Sept 199623 Jun 202624
Edlingham Burn at Battle Bridge29 Sept 199523 Jun 202624
Cawledge Burn site #22 Aug 200116 Jul 20245
Cawledge Burn1 Oct 199716 Jul 20245
Titlington burn7 Aug 20018 Jul 20244
Shipley burn at Aln Confluence8 Aug 20018 Jul 20246
Shipley Burn29 Sept 19958 Jul 20247
Denwick Burn at Golden Moor Farm4 Sept 20128 Jul 20242
Denwick Burn12 Oct 20018 Jul 20244
River Aln at Old Hawkhill Ford9 Sept 19963 Jul 20249
Cawledge Burn, Rugley Wood6 Oct 19953 Jul 20245
River Aln at Abberwick Mill.6 Aug 20011 Jul 20244
River Aln at Abberwick Ford20 Sept 19931 Jul 20246
Glen aln Burn6 Aug 20011 Jul 20244
Shawdon Burn13 Sept 199626 Jun 20247
Edlingham Burn at Lemmington22 Jul 200526 Jun 20243
Edlingham Burn12 Sept 199626 Jun 20246
Swine Burn, Thrunton Mill.21 Aug 200125 Jun 20245
River Aln at Whittingham16 Sept 199625 Jun 20245
River Aln at Bridge of Aln22 Sept 199325 Jun 20248
Coe Burn caravan park12 Oct 200125 Jun 20245
Coe Burn29 Sept 199725 Jun 20245
River Aln Upstream of Whittingham Ford23 Sept 199324 Jun 20249
Callally Burn, callally mill21 Aug 200124 Jun 20245
Callally Burn at Whittingham7 Oct 199724 Jun 20246
Coe Burn at Low Broome Park20 Jul 20052 Jul 20192
Edlingham Burn at Bannermoor29 Sept 199514 Sept 20155
River Aln at Hulne Priory5 Aug 200816 Sept 20142
River Aln at Little Ryle6 Oct 199511 Sept 20142
Aln at Bridge End18 Sept 201218 Sept 20121
River Aln at Hulne Park26 Sept 200826 Sept 20081
River Aln at Filberthaugh21 Sept 199310 Jul 20068
River Aln at Lesbury20 Sept 199325 Jul 20053
Coe Burn at Brickworks25 Jul 200525 Jul 20051
Coe Burn at Low LearChild12 Sept 199614 Jul 20052
Shipley Burn B6346 Road Bge8 Jul 20028 Jul 20021
River Aln at Alndyke20 Sept 199320 Sept 19931

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

1993–2026

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 9,364 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
5.9 cm
Median
6.8 cm
Upper quarter
10.5 cm
Largest
50 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Aln

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

European eel Stone loach Atlantic salmon Minnow 3-spined stickleback River lamprey

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 →