RiverFish

Grayling · Thymallus thymallus

Grayling in the River Ouse/Ure eel surveys

Largest measured grayling: 29.2 cm

The largest grayling measured in Environment Agency surveys of the River Ouse/Ure eel surveys was 29.2 cm, recorded at River Skell d/s Ripon Bypass on 2 June 2014.

Across 60 measured grayling, the median measured length was 15.2 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 Ouse/Ure eel surveys.

See grayling records across England →

Most recent observation4 June 2026River Skell d/s Ripon Bypass · 13 fish
Largest measured grayling
29.2 cm
Median length
15.2 cm
Fish measured
60
Survey locations
1

Individual EA measurements

Largest measured grayling

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
29.2 cm2 Jun 2014River Skell d/s Ripon Bypass141568
26.5 cm6 Jun 2016River Skell d/s Ripon Bypass148189
26 cm6 Jun 2016River Skell d/s Ripon Bypass148189
24.8 cm6 Jun 2016River Skell d/s Ripon Bypass148189
22.3 cm2 Jun 2014River Skell d/s Ripon Bypass141568
19.3 cm2 Jun 2014River Skell d/s Ripon Bypass141568
19.2 cm2 Jun 2014River Skell d/s Ripon Bypass141568
19.2 cm2 Jun 2014River Skell d/s Ripon Bypass141568
18.6 cm7 Jun 2024River Skell d/s Ripon Bypass165177
18.4 cm2 Jun 2014River Skell d/s Ripon Bypass141568

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 surveyedFirst recordedLast recordedVisits finding grayling
River Skell d/s Ripon Bypass2 Jun 20144 Jun 20265

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

2014–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 60 measured fish were spread across different length ranges.

Smallest
3.8 cm
Lower quarter
8.3 cm
Median
15.3 cm
Upper quarter
17.4 cm
Largest
29.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ouse/Ure eel surveys

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

European eel 3-spined stickleback Bullhead Stone loach Roach 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 →