RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Marron

Largest measured brown / sea trout: 21.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Marron was 21.3 cm, recorded at 1704.00 Calva Hall, River Marron on 3 September 2024.

Across 1,068 measured brown / sea trout, the median measured length was 7.3 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 Marron.

See brown / sea trout records across England →

Most recent observation11 August 20251704.00 Calva Hall, River Marron · 4 fish
Largest measured brown / sea trout
21.3 cm
Median length
7.3 cm
Fish measured
1,068
Survey locations
9

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
21.3 cm3 Sept 20241704.00 Calva Hall, River Marron167094
20.6 cm21 Jul 20231700.00 Asby, River Marron162704
20.3 cm3 Sept 20241704.00 Calva Hall, River Marron167094
19.4 cm18 Jul 20191704.00 Calva Hall, River Marron155042
19.3 cm3 Sept 20241715.00 Snary Beck, River Marron167131
18.6 cm21 Jul 20231700.00 Asby, River Marron162704
18.5 cm8 Jul 20211704.00 Calva Hall, River Marron160018
18.3 cm18 Jul 20191704.00 Calva Hall, River Marron155042
18 cm3 Sept 20241715.00 Snary Beck, River Marron167131
17.8 cm3 Sept 20241704.00 Calva Hall, River Marron167094

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
1704.00 Calva Hall, River Marron24 Jul 200211 Aug 202517
1715.00 Snary Beck, River Marron4 Aug 20031 Jul 202510
1728.00 Lostrigg Beck, River Marron4 Aug 200321 Jul 20237
1713.95 Wisenholme Beck near Mill House4 Aug 200321 Jul 20236
1700.00 Asby, River Marron4 Aug 200321 Jul 20237
1718.00 Black Beck, River Marron8 Aug 200320 Jul 20237
1713.90 US Fitz Bridge, Wisenholme Beck, R Marron23 Jul 201420 Jul 20232
1702.00 Ullock, River Marron8 Aug 200320 Jul 20236
1701.00 nr Wright Green, River Marron4 Aug 200320 Jul 20237

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

2002–2025

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 1,068 measured fish were spread across different length ranges.

Smallest
4.9 cm
Lower quarter
6.6 cm
Median
7.3 cm
Upper quarter
8.4 cm
Largest
21.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Marron

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

Atlantic salmon European eel

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 →