Grayling · Thymallus thymallus

Grayling in the River Aire

Largest measured grayling: 46.4 cm

The largest grayling measured in Environment Agency surveys of the River Aire was 46.4 cm, recorded at Gargrave STW on 20 August 1998.

Across 531 measured grayling, the median measured length was 20.2 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 Aire.

See grayling records across England →

Most recent observation30 June 2026Hirstwood, u/s Bradford Beck · 1 fish

Largest measured grayling: 46.4 cm
Median length: 20.2 cm
Fish measured: 531
Survey locations: 9

Individual EA measurements

Largest measured grayling

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
46.4 cm	20 Aug 1998	Gargrave STW	109468
41.5 cm	10 Jul 2006	Carleton Bridge	101562
41.2 cm	27 Jun 2011	Carleton Bridge	127096
40.7 cm	27 Jun 2011	Carleton Bridge	127096
40.1 cm	10 Jul 2006	Carleton Bridge	101562
39.7 cm	27 Jun 2011	Carleton Bridge	127096
39.5 cm	22 Jul 2005	Carleton Bridge	87556
39 cm	28 Jun 2010	Carleton Bridge	122786
38.8 cm	22 Jun 2009	Carleton Bridge	117724
38.7 cm	22 Jun 2009	Carleton Bridge	117724

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

Explore the river

Where grayling were found

Each point marks a survey location with at least one grayling 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 grayling
Hirstwood, u/s Bradford Beck	7 Aug 2007	30 Jun 2026	8
Crossflatts	22 Jul 2003	25 Jul 2017	10
Carleton Bridge	20 Aug 1998	24 Jul 2017	13
Upstream Esholt STW	2 Jul 2014	2 Jul 2014	1
Kirkstall (400m d/s weir)	23 Jun 2009	30 Jun 2014	3
Silsden Bridge	22 Jul 2003	26 Jun 2014	8
Skelton Grange	30 Sept 2013	30 Sept 2013	1
Cononley, below Snaygill STW	27 Aug 1998	29 Jul 2005	5
Gargrave STW	20 Aug 1998	20 Aug 1998	1

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

1998–2026

Survey records by year

Each bar shows how many survey visits recorded grayling that year.

398

099

000

001

202

403

304

405

206

407

408

509

510

311

012

113

614

015

016

317

018

019

020

021

022

023

024

025

126

Fish measured by surveyors

Measured length distribution

See how the 531 measured fish were spread across different length ranges.

Smallest: 5.3 cm
Lower quarter: 8.4 cm
Median: 20.2 cm
Upper quarter: 24.2 cm
Largest: 46.4 cm

0–99 mm

179

100–199 mm

200–299 mm

195

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Aire

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

Minnow Stone loach Chub Gudgeon Bullhead Brown / sea trout

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 →