RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the Hermitage Water

Largest measured brown / sea trout: 15.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the Hermitage Water was 15.3 cm, recorded at 2169.20 DS Twislehope Burn, Hermitage Water on 28 July 2025.

Across 426 measured brown / sea trout, the median measured length was 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 Hermitage Water.

See brown / sea trout records across England →

Most recent observation28 July 20252169.20 DS Twislehope Burn, Hermitage Water · 110 fish
Largest measured brown / sea trout
15.3 cm
Median length
7 cm
Fish measured
426
Survey locations
9

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
15.3 cm28 Jul 20252169.20 DS Twislehope Burn, Hermitage Water177583
14.8 cm2 Sept 20242172.80 US Hermitage Farm Cottage CPUE166862
14.5 cm22 Jul 20212172.00 Near Hermitage Castle, Hermitage160418
14.2 cm28 Jul 20252169.20 DS Twislehope Burn, Hermitage Water177583
14 cm27 Jul 20222169.20 DS Twislehope Burn, Hermitage Water161919
13.5 cm2 Sept 20242172.50 On Track to Shaws Farm CPUE166861
13.2 cm28 Jul 20252169.20 DS Twislehope Burn, Hermitage Water177583
12.9 cm2 Sept 20242169.10 DS Twislehope Burn CPUE166859
12.8 cm27 Jul 20222169.20 DS Twislehope Burn, Hermitage Water161919
12.6 cm2 Sept 20242173.00 Heartsgarth Farm CPUE166864

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
2169.20 DS Twislehope Burn, Hermitage Water15 Jul 200328 Jul 202517
2175.01 Nr South Greenholme CPUE30 Aug 20232 Sept 20242
2173.00 Heartsgarth Farm CPUE30 Aug 20232 Sept 20242
2172.80 US Hermitage Farm Cottage CPUE30 Aug 20232 Sept 20242
2172.50 On Track to Shaws Farm CPUE10 Aug 20232 Sept 20242
2169.10 DS Twislehope Burn CPUE10 Aug 20232 Sept 20242
2172.00 Near Hermitage Castle, Hermitage3 Aug 200522 Jul 20213
2175.00 Near South Greenholme, Hermitage Water3 Aug 200524 Aug 20112
2170.00 Gorrenberry, Hermitage Water18 Jul 200218 Jul 20021

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

2002–2025

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 426 measured fish were spread across different length ranges.

Smallest
4.8 cm
Lower quarter
6.5 cm
Median
7.1 cm
Upper quarter
7.7 cm
Largest
15.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Hermitage Water

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

Atlantic salmon European eel

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 →