RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Main Inny

Largest measured brown / sea trout: 50.5 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Main Inny was 50.5 cm, recorded at Bealsmill on 4 June 2009.

Across 2,667 measured brown / sea trout, the median measured length was 9 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 Main Inny.

See brown / sea trout records across England →

Most recent observation21 August 2025U/s Davidstow Creamery Discharge · 60 fish
Largest measured brown / sea trout
50.5 cm
Median length
9 cm
Fish measured
2,667
Survey locations
19

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
50.5 cm4 Jun 2009Bealsmill117367
47 cm8 Sept 2015Bealsmill146345
46.5 cm18 Sept 2012Bealsmill133742
46.5 cm10 Jul 2003Killabury76510
40.6 cm9 Jun 2009Trewen117359
37.3 cm6 Aug 2004Treguddick81420
37.1 cm1 Aug 2013St. Clether138038
36.5 cm17 Jun 2010Bealsmill122467
35.9 cm18 Sept 2012Bealsmill133742
35.3 cm17 Jun 2010Bealsmill122467

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
U/s Davidstow Creamery Discharge11 Aug 202121 Aug 20252
St. Clether6 Jul 198413 Aug 202514
Trewinnow7 Aug 199912 Aug 20258
Treguddick Mill25 Jul 200822 Jul 202512
Upstream Killabury10 Oct 202310 Oct 20231
Trecarrell2 Jul 19847 Sept 20239
Downstream Bealsmill7 Sept 20237 Sept 20231
Knightsmill29 Jun 198429 Jun 20238
Treglasta27 Jul 198415 Sept 20213
Bealsmill26 Jun 198426 Aug 202114
U/s Inny Vale STW13 Aug 202113 Aug 20211
Larrick5 Jun 200928 Jul 20213
Trewen6 Jul 198419 Jul 20218
u/s Laneast Bridge5 Jul 198416 Jul 20217
Treguddick3 Jul 198412 Sept 200711
Inny Foot26 Jun 198415 Jul 20036
Killabury29 Jun 198410 Jul 20034
Trekenner Mill2 Jul 198430 Jul 19994
Hicks Mill3 Jul 19842 Jul 19963

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

1984–2025

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 2,667 measured fish were spread across different length ranges.

Smallest
3.2 cm
Lower quarter
7 cm
Median
9 cm
Upper quarter
15.9 cm
Largest
50.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Inny

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

Atlantic salmon Bullhead Stone loach European eel Minnow Grayling

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 →