Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the River Chess

Largest measured rainbow trout: 47.1 cm

The largest rainbow trout measured in Environment Agency surveys of the River Chess was 47.1 cm, recorded at Latimer on 4 July 2006.

Across 31 measured rainbow trout, the median measured length was 22.6 cm.

Surveyors recorded weights for 27 rainbow trout. The median was 4.4 oz (0.126 kg) and the largest recorded weight was 2 lb 6.8 oz (1.1 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 Chess.

See rainbow trout records across England →

Most recent observation20 September 2017Mountwood Ford · 1 fish

Largest measured rainbow trout: 47.1 cm
Median length: 22.6 cm
Fish measured: 31
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
47.1 cm	4 Jul 2006	Latimer	99927
47 cm	25 Nov 1987	Latimer Island	116113
45.1 cm	4 Jul 2006	Latimer	99927
44.5 cm	20 Sept 2017	Mountwood Ford	151698
43.6 cm	25 Nov 1987	Latimer Island	116113
41.5 cm	23 Oct 2012	Bois Mill	134381
40.5 cm	25 Nov 1987	Latimer Island	116113
39 cm	25 Nov 1987	Latimer Island	116113
38.7 cm	25 Nov 1987	Latimer Island	116113
37.3 cm	25 Nov 1987	Latimer Island	116113

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
Mountwood Ford	1 Dec 1987	20 Sept 2017	2
Bois Mill	23 Oct 2012	23 Oct 2012	1
Latimer	4 Jul 2006	4 Jul 2006	1
Latimer Island	25 Nov 1987	25 Nov 1987	1

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

1987–2017

Survey records by year

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

287

088

089

090

091

092

093

094

095

096

097

098

099

000

001

002

003

004

005

106

007

008

009

010

011

112

013

014

015

016

117

Fish measured by surveyors

Measured length distribution

See how the 31 measured fish were spread across different length ranges.

Smallest: 14.2 cm
Lower quarter: 18.5 cm
Median: 22.6 cm
Upper quarter: 38.9 cm
Largest: 47.1 cm

100–199 mm

200–299 mm

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 27 rainbow trout. This is a subset of the measured fish and may not represent the whole population.

Lightest: 1.3 oz (0.038 kg)
Lower quarter: 2.9 oz (0.082 kg)
Median: 4.4 oz (0.126 kg)
Upper quarter: 1 lb 6.5 oz (0.6365 kg)
Heaviest: 2 lb 6.8 oz (1.1 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 Chess

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

Brown / sea trout Bullhead Stone loach Minnow 3-spined stickleback 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 →