RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Derwent

Largest measured brown / sea trout: 54.2 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Derwent was 54.2 cm, recorded at Yorkshire Bridge on 28 May 2003.

Across 1,371 measured brown / sea trout, the median measured length was 19.1 cm.

Surveyors recorded one individual weight: 9.4 oz (0.266 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 Derwent.

See brown / sea trout records across England →

Most recent observation8 October 2025Rowsley · 3 fish
Largest measured brown / sea trout
54.2 cm
Median length
19.1 cm
Fish measured
1,371
Survey locations
22

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
54.2 cm28 May 2003Yorkshire Bridge52006
49.5 cm28 May 2002Yorkshire Bridge51881
46.3 cm29 Sept 2025Duffield Bridge179191
45.2 cm25 Aug 2011Hathersage127624
43.6 cm3 Jul 2013Hathersage139763
43.5 cm19 Jul 2016Cromford148548
43.3 cm25 Aug 2011Hathersage127624
42.4 cm10 Sept 2009Yorkshire Bridge119546
41.6 cm15 Aug 2014Yorkshire Bridge143530
41.5 cm30 Sept 2002Cromford63201

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
Rowsley8 Oct 20258 Oct 20251
Duffield Bridge4 Sept 201429 Sept 20256
Howden Moor13 Nov 199717 Sept 20247
Hathersage29 Jan 199814 Sept 202214
Cromford Willersley Castle Salmon parr26 Aug 202226 Aug 20221
Yorkshire Bridge31 Jan 199614 Sept 201810
Belper Weir Salmon Parr17 Oct 201710 Sept 20182
Cromford26 Feb 19986 Sept 201813
Cromford Salmon Parr4 Sept 201417 Oct 20174
Chub Alley25 Jul 201725 Jul 20171
Borrowash Fish Pass Pool125 Feb 201625 Feb 20161
DS Longbridge Weir4 Sept 201414 Sept 20152
Slippery Stones3 Mar 199326 Sept 20136
US Slippery Stones21 Jun 201121 Jun 20111
DS Slippery Stones21 Jun 201121 Jun 20111
DS Calver Weir18 Oct 201018 Oct 20101
Peckwash Mill1 Sept 20101 Sept 20101
Duffield10 Sept 20064 Oct 20092
Matlock Bath29 Apr 19933 Sept 20064
Baslow28 Jan 199815 Jun 20052
Wyver Lane18 May 200518 May 20051
Ambergate3 Feb 19973 Feb 19971

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 1,371 measured fish were spread across different length ranges.

Smallest
3.9 cm
Lower quarter
10.4 cm
Median
19.1 cm
Upper quarter
27 cm
Largest
54.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight
9.4 oz (0.266 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 Derwent

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

Bullhead Minnow Grayling Chub Stone loach Perch

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 →