Parking
Start at Fairholmes Car Park / Upper Derwent Visitor Centre, just north of the A57 Snake Pass road. The café kiosk and visitor toilets are at the trailhead.

Peak District National Park, EN
Climb through Hagg Side woods for broad reservoir views.
Overview
Map & elevation
Plan your hike

The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Peak District Tour Guide
Parkwolf is a GPS audio tour guide for Peak District National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.
Recorded for this trailhead
Derwent Dam from Fairholmes“You're coming up on Fairholmes, the starting point for a short walk to Derwent Dam. Its twin stone towers make the wall look almost like a castle, and from below you get a sense of its scale.”
Plays as you drive up to this trailhead in the Parkwolf Peak District Tour Guide.
More stories near here in the app
Trail guide
Derwent Dam Green Route is a 3.7-mile (6 km) circuit from Fairholmes, past the dam, up through Hagg Side woods to the ridge, then back beside the reservoir. Allow about two hours; the loop climbs roughly 525 feet (160 m). It is a good step up from the short dam visit if you want a hill section and wide water views.
The dam comes early, so you can see its twin towers and the Dambusters memorial before the steep wooded climb begins. The route winds up and around Hagg Side; on a clear day, the ridge opens across the valley and reservoirs. From there it drops back toward the water and returns to Fairholmes. Underfoot changes from surfaced paths to compacted track, dirt and grass, with uneven ground on the woodland climb.
RAF 617 Squadron practiced its bouncing-bomb runs at Derwent ahead of the 1943 Ruhr raid. For a photo, frame both towers with the reservoir and wooded hillside; Hagg Side gives the wider valley view. Fairholmes has a café kiosk and toilets open during daylight hours. If you mainly want the dam, the separate red loop is about one mile and much shorter.
Wildlife
248 sightingsRed DeerMost seen around 7 AMSighting map
36 sightingsRed FoxMost seen around 6 AMSighting map
15 sightingsEurasian OtterMost seen around 7 PMSighting map
51 sightingsPeregrine FalconMost seen around 6 PMSighting map
47 sightingsEuropean Fallow DeerMost seen around 6 AMSighting map
54 sightingsWestern Roe DeerMost seen around 7 PMSighting mapSighting maps show where each species has been reported across Peak District. Wildlife moves, so no sighting is guaranteed.
Keep exploring
ModerateDerwent Dam Black Route4 km · 1.3 hr · At the trailheadA short loop for the dam’s twin stone towers and reservoir views.
ModerateAlport Castles Walk12.1 km · 4 hr · At the trailheadA full moorland loop to one of the Peak’s strangest rock landscapes.
ModerateDerwent Valley and Reservoir Walk7.4 km · 2.5 hr · At the trailheadReservoir views, a lost village and moorland in one compact loop.
ModerateDerwent Edge Circular Walk12.9 km · 5 hr · 0.1 km awayA gritstone ridge loop with a reservoir view at every turn.
ChallengingDerwent and Howden Reservoirs and Margery Hill Circular18 km · 5.5 hr · 0.1 km awayReservoir roads lead to a lonely trig point and wide moorland views.
EasyDerwent Dam Red Route1.9 km · 36 min · 0.1 km awayA short loop to Peak District’s twin-towered dam
ChallengingLadybower Reservoir Circular27 km · 8.5 hr · 4.3 km awayA full-day reservoir circuit with viaducts, moorland and long views.
EasyLadybower Miles Without Stiles2 km · 45 min · 4.6 km awayA short surfaced route brings the dam and two plugholes into view.
Sight · 0.5 km awayDerwent DamTwin stone towers guard a masonry wall in the Dambusters valley
Sight · 3.7 km awayAlport CastlesHuge gritstone landslip and lonely moorland views above Alport Dale
Sight · 4.2 km awayHowden ReservoirThe quiet uppermost reservoir, ending at a 1912 Grade II dam
Sight · 4.5 km awayLadybower ReservoirY-shaped reservoir with waterside walks, dam views and easy short routes
Sight · 4.5 km awayWin HillSteep, short climb to a rocky trig point above Ladybower
Sight · 5.7 km awayBamford EdgeGritstone slabs high above Ladybower Reservoir and the Hope Valley
Campground · 6.1 km awayCastleton Caravan and Motorhome Club CampsiteHardstanding touring base in a bowl, half a mile from Castleton.
Sight · 6.1 km awayEdaleWhere the Pennine Way begins, beneath Kinder Scout's brooding moorlandParkwolf’s Peak District ranking
The Roaches and Lud’s Church Circular from Hen CloudModerate · 12.2 km
Mam Tor Circular WalkModerate · 4.8 km
Castleton, Mam Tor & the Great Ridge WalkModerate · 10.5 km
Stanage Edge from HathersageModerate · 10.6 km
Kinder Scout Circular via Jacob’s LadderChallenging · 12.1 km
Padley Gorge and Burbage Brook WalkEasy · 3.7 km