Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the River Derwent

Largest measured rainbow trout: 52 cm

The largest rainbow trout measured in Environment Agency surveys of the River Derwent was 52 cm, recorded at Hathersage on 13 September 2018.

Across 94 measured rainbow trout, the median measured length was 36 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 Derwent.

See rainbow trout records across England →

Most recent observation13 September 2018Hathersage · 5 fish

Largest measured rainbow trout: 52 cm
Median length: 36 cm
Fish measured: 94
Survey locations: 5

Individual EA measurements

Largest measured rainbow trout

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
52 cm	13 Sept 2018	Hathersage	153354
50.8 cm	12 Apr 1999	Yorkshire Bridge	23446
50 cm	13 Sept 2018	Hathersage	153354
46.6 cm	4 May 2005	Cromford	84825
45 cm	10 Sept 2012	Hathersage	133812
44 cm	13 Sept 2018	Hathersage	153354
43.8 cm	3 Jul 2013	Hathersage	139763
43.2 cm	28 Jan 1998	Baslow	23931
42.2 cm	28 Jan 1998	Baslow	23931
42.1 cm	28 Jan 1998	Baslow	23931

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where rainbow trout were found

Each point marks a survey location with at least one rainbow 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 surveyed	First recorded	Last recorded	Visits finding rainbow trout
Hathersage	29 Jan 1998	13 Sept 2018	13
Yorkshire Bridge	12 Apr 1999	10 Sept 2009	4
Matlock Bath	2 Sept 2005	2 Sept 2005	1
Baslow	28 Jan 1998	15 Jun 2005	2
Cromford	4 May 2005	4 May 2005	1

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

1998–2018

Survey records by year

Each bar shows how many survey visits recorded rainbow trout that year.

298

299

000

001

102

103

004

405

006

107

108

209

110

111

112

113

114

015

116

017

118

Fish measured by surveyors

Measured length distribution

See how the 94 measured fish were spread across different length ranges.

Smallest: 6.4 cm
Lower quarter: 31.1 cm
Median: 36 cm
Upper quarter: 40.2 cm
Largest: 52 cm

0–99 mm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

500–599 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent

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

Brown / sea trout Bullhead Minnow Grayling Chub Stone loach

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 →