26.6 miles
8,361 ft
-8,368 ft
3,716 ft
High Point

This is a bit of a classic Nelson back country loop. This route goes from Brook Street, up to the Dun Mountain Saddle, then to the summit of Dun Mountain, down to the Little Twin climb, to Little Twin summit then dropping down via Dew Lakes to the Maitai Dam and back along Maitai Valley Road. Give it between 5-7hrs depending on fitness, weather and if you want to hang around at the top. It's very exposed on the summit of Dun Mountain so definitely take a god amount of kit. EPIRB recommended as well as usual back country planning stuff. The descents are grade 5 and well worth the trip. Scenery goes from native to alpine, to native and everything in between. No signs after Dun Saddle so be prepared with map/offline route etc.

Basic overview - ride up Dun Mountain Trail to the saddle (grade 3), then carry up to the Dun Mountain summit, descend from summit (grade 4), ride/hike up Little Twin, descend Little Twin (grade 5) to Dew Lakes. Descend Dew Lakes (grade 5) to Maitai Dam. Ride back to Nelson on the Maitai Valley Road.

Route Supporters
Local Trail Association
Nelson Mountain Bike Club (nelsonmtb.club)
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Trails in Route

Dun Mountain Trail124.3 miles
Pipeline4,331 ft
Dew Lakes track10.7 miles


  • Difficulty rating
    Black Diamond
  • Route Type
  • Bike type
    AM, XC
  • Direction
    One Direction
  • Physical rating
More Stats for Dun Mountain, Little Twin, Dew Lakes mountain bike route
  • Altitude min
    3 ft
  • Altitude start
    101 ft
  • Altitude end
    93 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    12.1 miles
  • Distance down
    13.1 miles
  • Distance flat
    1.4 miles
Avg: 3 (2 votes)
Layers winter
Map Style
Trail Style
  • ?
Trail transparency

Recent Trail Reports Along Route

Dun Mountain Trail
Apr 18, 2017 @ 10:19pm
Apr 18, 2017
Mostly dry with the occasional puddle. There are a couple of trees down across the track that require carrying your bike over.
Summit Ascent
Nov 5, 2016 @ 6:20pm
Nov 5, 2016
Dew Lakes track
Oct 19, 2015 @ 1:35pm
Oct 19, 2015
Trail in great condition, a little overgrown in a couple of places (as per usual) but no windfall and riding really well
more reports »
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