Best time to go
DOC warns that sandflies can be especially bothersome in summer, and wasps are particularly common from December to April. Those are the main seasonal irritants to plan around.

Campground · Nelson Lakes National Park
Powered, tent and campervan sites beside Lake Rotoiti.
Overview
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The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Nelson Lakes Tour Guide
Parkwolf is a GPS audio tour guide for Nelson Lakes 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.
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Kerr Bay and Lake Rotoiti“You're approaching Kerr Bay, an easy place to get down to Lake Rotoiti without taking on a hike.”
Plays as you drive up to Kerr Bay Campsite in the Parkwolf Nelson Lakes Tour Guide.
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Guide
Kerr Bay is a Department of Conservation campground beside Lake Rotoiti at St Arnaud, set among beech forest. Its 25 sites are split across six zones: Bellbird, Fantail, Robin and Tui have powered sites; Kaka is a grassy tent area; and Kiwi is gravel for campervans. Bookings are required year-round, and there are no walk-up spaces held back. Check the zone when you book: tent ground and lake views vary, so a campsite here doesn't guarantee a level pitch or a view of the water. Vehicles longer than 7 metres aren't suitable.
The shared day shelter has kitchen and cooking facilities, but no cookware or cutlery. The ablution block has toilets, hot token-operated showers, a full-access shower and toilet, and a washer and dryer. Get shower tokens from the camp host or visitor centre. A sewage dump station is opposite the cooking shelter. There are no rubbish or recycling facilities, so take it all away; dogs and fires aren't allowed.
St Arnaud's village shop is about 500 metres away, so plan to bring food or make a separate stop. For Christmas, Easter, the Classic Boat Show and powerboat regatta weekends, DOC recommends booking well ahead.
The roughly 30-minute Black Valley Walk starts inside the campground and follows the stream. The roughly 15-minute Bellbird Walk begins at the east-jetty car park nearby and loops through beech forest and a small wetland. A boat launching ramp is also close by.
The Bellbird Walk passes large red beech trees where tūī and bellbirds feed. New Zealand fuchsia grows along the track, and the wet patch supports sedges, rushes, ferns and mosses. It's a good little walk for noticing the forest, not just getting from camp to the lake.
The black coating on some beech trunks is sooty mould, growing on sweet honeydew that scale insects leave after feeding on the trees. Birds, insects and lizards feed on those droplets. Once you know what the dark trunks are, the forest has a whole extra layer to look for.
Black Valley Stream cuts through gravel and rubble left by glaciers. Metal bands on some trees stop possums climbing to mistletoe crowns. This work is part of the wider Rotoiti Nature Recovery Project, which manages more than 5,000 hectares of honeydew beech forest and has helped native species recover through pest control.
Wildlife
20 sightingsNew Zealand FalconMost seen around 9 AMSighting map
39 sightingsWekaMost seen around 7 AMSighting map
11 sightingsKererūMost seen around 9 AMSighting map
55 sightingsBlack SwanMost seen around 8 AMSighting map
23 sightingsParadise ShelduckMost seen around 6 AMSighting map
17 sightingsTūīMost seen around 7 AMSighting mapSighting maps show where each species has been reported across Nelson Lakes. Wildlife moves, so no sighting is guaranteed.
Keep exploring
EasyGibbs Walk0.3 km · 12 min · At the trailheadA brief beech climb over old glacial moraine.
ChallengingTravers-Sabine Circuit80 km · 1.3 days · 0.1 km awayAn 80 km alpine loop through remote valleys and a high pass.
ChallengingLake Rotoiti Circuit23.4 km · 8.5 hr · 0.1 km awayTwo huts, one lake, and a ford that sets the route.
ModerateLakehead Track10.4 km · 3 hr · 0.1 km awayA beech forest walk to a hut at Lake Rotoiti’s head.
ModerateLoop Track4.5 km · 1.5 hr · 0.1 km awayA 4.5 km beech forest loop climbs terraces above Lake Rotoiti.
EasyBlack Valley Walk0.8 km · 30 min · 0.2 km awayFollow a beech-forest stream between the lake and St Arnaud.
ChallengingSt Arnaud Range Track10 km · 5 hr · 0.2 km awayA long beech climb opens onto an exposed ridge above Lake Rotoiti.
EasyHoneydew Walk1.7 km · 45 min · 0.2 km awayA short beech-forest loop with honeydew-fed birds and glacial boulders.
Sight · 0.4 km awayLake Rotoiti – Kerr Bay and JettyA mountain-framed jetty with eels beneath the water.
Visitor center · 0.4 km awayNelson Lakes National Park Visitor CentreA good first stop for track advice, maps, and backcountry supplies.
Lodging · 0.4 km awayAlpine LodgeLodging, dinner and fast charging share this alpine village stop.
Store · 0.5 km awaySt Arnaud General StoreA handy fuel, grocery and café stop before the lakes.
Sight · 0.5 km awayClassic Boat MuseumClassic boats and engines, packed into a small St Arnaud museum.
Sight · 1.7 km awayWest Bay, Lake RotoitiShort walks lead from lake views to glacier-shaped ponds.
Campground · 1.9 km awayTeetotal CampsiteA quiet tent base beside Teetotal’s trails and winter skating pond.
Sight · 1.9 km awayDuck PondA rare chance to skate on natural pond ice.Parkwolf’s Nelson Lakes ranking