RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Nidd

Largest measured brown / sea trout: 55.6 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Nidd was 55.6 cm, recorded at u/s Pately Bridge on 24 September 2015.

Across 1,697 measured brown / sea trout, the median measured length was 15.8 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 Nidd.

See brown / sea trout records across England →

Most recent observation21 August 2025Lofthouse d/s · 11 fish
Largest measured brown / sea trout
55.6 cm
Median length
15.8 cm
Fish measured
1,697
Survey locations
16

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
55.6 cm24 Sept 2015u/s Pately Bridge146704
50.2 cm3 Jul 2014Knaresborough Bypass141544
45.1 cm7 Sept 2015u/s Hampsthwaite Bridge146330
43.6 cm10 Jul 2014Cowthorpe141648
43.1 cm25 Jun 2015Knaresborough Bypass145167
43 cm12 Aug 2002Lofthouse d/s68120
42.9 cm12 Sept 2024Scotton Mill166998
42.7 cm19 Sept 2001Lofthouse d/s110506
42.3 cm30 Jun 2022Ribston Park (NEW 2018)161175
42.2 cm19 Jun 2013Knaresborough Bypass136534

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
Lofthouse d/s19 Sept 200121 Aug 202517
Knaresborough Bypass9 Aug 20059 Jul 202513
Ribston Park (NEW 2018)3 Jul 20198 Jul 20254
Cowthorpe28 Aug 20037 Jul 202518
Scotton Mill14 Jun 200512 Sept 20245
Summerbridge9 Jun 20054 Sept 20245
Newhouses19 Sept 20014 Sept 20246
Ribston Park8 Aug 200513 Jul 20178
Nun Monkton18 Jul 201424 Jun 20162
Conyngham Hall28 Sept 201528 Sept 20151
u/s Pately Bridge30 Oct 200124 Sept 20154
u/s Hampsthwaite Bridge9 Jun 20057 Sept 20153
Birstwith13 Jun 20057 Sept 20153
Goldsborough22 Jul 201522 Jul 20151
Killinghall14 Jun 200514 Jun 20051
d/s Glasshouse WTW13 Jun 200513 Jun 20051

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

2001–2025

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 1,697 measured fish were spread across different length ranges.

Smallest
4 cm
Lower quarter
8.9 cm
Median
15.8 cm
Upper quarter
23.2 cm
Largest
55.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Stone loach Grayling European eel Gudgeon

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 →