RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Bollin

Largest measured brown / sea trout: 52 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Bollin was 52 cm, recorded at Bobo16 on 7 September 2004.

Across 3,510 measured brown / sea trout, the median measured length was 11.5 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 Bollin.

See brown / sea trout records across England →

Most recent observation9 September 2025Bobo07 · 1 fish
Largest measured brown / sea trout
52 cm
Median length
11.5 cm
Fish measured
3,510
Survey locations
23

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
52 cm7 Sept 2004Bobo1682085
48.6 cm17 Jul 2025Bobo10179832
47.7 cm18 Aug 2003Bobo3076692
47 cm23 Jun 2008Bobo20111404
47 cm5 May 2004Bo0279740
46 cm4 Aug 2005Bobo1585375
45.9 cm15 Sept 2022Bobo10161994
45.6 cm17 Jul 2025Bobo10179832
43 cm15 Sept 2022Bobo10161994
42 cm4 Aug 2005Bobo1685378

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
Bobo079 Sept 20259 Sept 20251
Bobo059 Sept 20259 Sept 20251
Bo1120 Sept 20228 Sept 20252
Bobo123 Aug 201022 Jul 20254
Bobo1022 Aug 200117 Jul 20259
Bo0818 Aug 199316 Jul 20254
Bo0718 Aug 199321 Sept 20224
Bo0417 Aug 199321 Sept 20223
Bobo315 Sept 20225 Sept 20221
Bo0217 Aug 199325 Jul 201824
Bo0117 Aug 199325 Jul 201825
Bobo1310 Jun 201310 Jun 20131
Bobo1919 Aug 201119 Aug 20111
Bo0317 Aug 199329 Apr 201023
Bobo208 Jul 200523 Jun 20082
Bobo1626 Jul 20024 Aug 20053
Bobo154 Aug 20054 Aug 20051
Bobo3018 Aug 200318 Aug 20031
Bo096 Aug 19966 Aug 19961
Bo0518 Aug 19936 Aug 19962
Bo1526 Aug 199323 Jul 19962
Bo2226 Jun 199626 Jun 19961
Bo0618 Aug 199318 Aug 19931

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

1993–2025

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 3,510 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
8.3 cm
Median
11.5 cm
Upper quarter
15.9 cm
Largest
52 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Bollin

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

Stone loach 3-spined stickleback Bullhead Gudgeon Chub Roach

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 →