Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the River Derwent (Yorkshire)

Largest measured rainbow trout: 30.6 cm

The largest rainbow trout measured in Environment Agency surveys of the River Derwent (Yorkshire) was 30.6 cm, recorded at Downstream Wrench Green Bridge.DERBT2 on 25 June 2002.

Across 4 measured rainbow trout, the median measured length was 29.4 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 (Yorkshire).

See rainbow trout records across England →

Most recent observation28 June 2018Buttercrambe DERCORS9 · 1 fish

Largest measured rainbow trout: 30.6 cm
Median length: 29.4 cm
Fish measured: 4
Survey locations: 4

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
30.6 cm	25 Jun 2002	Downstream Wrench Green Bridge.DERBT2	72063
29.6 cm	25 Jun 2002	Downstream Wrench Green Bridge.DERBT2	72063
29.2 cm	12 Sept 2005	Downstream Weir Head DERBT3	89098
20.2 cm	28 Jun 2018	Buttercrambe DERCORS9	152766

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
Buttercrambe DERCORS9	28 Jun 2018	28 Jun 2018	1
Malton DERCORS5	20 Sept 2005	20 Sept 2005	1
Downstream Weir Head DERBT3	12 Sept 2005	12 Sept 2005	1
Downstream Wrench Green Bridge.DERBT2	25 Jun 2002	25 Jun 2002	1

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

2002–2018

Survey records by year

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

102

003

004

205

006

007

008

009

010

011

012

013

014

015

016

017

118

Fish measured by surveyors

Measured length distribution

See how the 4 measured fish were spread across different length ranges.

Smallest: 20.2 cm
Lower quarter: 27 cm
Median: 29.4 cm
Upper quarter: 29.9 cm
Largest: 30.6 cm

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent (Yorkshire)

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

Minnow Bullhead Stone loach Dace European eel 3-spined stickleback

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 →