RiverFish

Rainbow trout · Oncorhynchus mykiss

Rainbow trout in the River Gwash

Largest measured rainbow trout: 41.2 cm

The largest rainbow trout measured in Environment Agency surveys of the River Gwash was 41.2 cm, recorded at Upstream White Post Bridge on 29 September 2016.

Across 27 measured rainbow trout, the median measured length was 22.7 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 Gwash.

See rainbow trout records across England →

Most recent observation5 July 2023Church bridge - u/s Empingham · 1 fish
Largest measured rainbow trout
41.2 cm
Median length
22.7 cm
Fish measured
27
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.

LengthSurvey dateSurvey locationSurvey ID
41.2 cm29 Sept 2016Upstream White Post Bridge150073
41 cm30 Sept 2016Belmesthorpe Meadow150080
39 cm30 Sept 2016Belmesthorpe Meadow150080
38.5 cm30 Sept 2016Belmesthorpe Meadow150080
38 cm25 Jun 2013Downstream Ingthorpe Road Bridge139020
38 cm25 Jun 2013Ingthorpe137452
35 cm30 Sept 2016Belmesthorpe Meadow150080
31.2 cm24 Jun 2013Belmesthorpe Meadow137453
29.7 cm12 Jul 2011Upstream White Post Bridge127444
25.8 cm24 Jun 2013Belmesthorpe Meadow137453

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 surveyedFirst recordedLast recordedVisits finding rainbow trout
Church bridge - u/s Empingham5 Jul 20235 Jul 20231
Upstream White Post Bridge12 Jul 201110 Sept 20185
Belmesthorpe Meadow24 Jun 201330 Sept 20163
Ingthorpe25 Jun 201316 Jun 20142
Downstream Ingthorpe Road Bridge25 Jun 201325 Jun 20131

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

2011–2023

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 27 measured fish were spread across different length ranges.

Smallest
11.7 cm
Lower quarter
14.2 cm
Median
22.7 cm
Upper quarter
33.1 cm
Largest
41.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Gwash

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

Brown / sea trout European eel Bullhead Grayling Dace Roach

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 →