27 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


  • Riding area
  • Difficulty rating
    Black Diamond
  • Route Type
  • Bike type
    AM, XC
  • Direction
    One Direction
  • Physical rating
  • Ridelogs
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 miles
  • Distance down
    13 miles
  • Distance flat
    1 miles
Avg: 3 (2 votes)
Layers winter
Trail Style
  • ?
Trail Conditions
  • Unknown
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
Trail transparency
Dun Mountain Trail, Coppermine Saddle, Nelson, NZ
Dun Mountain Trail, Coppermine Saddle, Nelson, NZ
5:30 | 30 | comments: 0 | favs:
Aug 14, 2018

Recent Trail Reports Along Route

Dun Mountain Trail
Sep 18, 2018 @ 12:00pm
Sep 18, 2018
1. As at 18 June, the closure reported on Aug 18 was by-passed by a detour along the Brook Waimarama sanctuary fence line. This is straightforward, a similar distance, a bit more up and down, but a similar time overall to the original track. It is not as pleasant as it is less in the forest and the fenceline is unattractive, but the loop is still worthwhile. Nelson City Council has indicated that this detour will be in place until trail repairs are completed. 2. However, in addition, the track beyond Third House (to Windy Point and Coppermine Saddle) is scheduled for closure for pest hunting operations from 17 to 30 September (per the NCC website). In practice, the track was open on 18 September, but this could change. 3. On 18 September, the portion of track below Maitai Dam along the pipeline above the Maitai Valley road was closed. It was possible to join the Maitai Valley road as an alternative. Again this is slightly more up and down and not as pleasant as the Dun trail. The reason for this was not clear - it may be caught by the hunting operations. Otherwise, track was in good condition, but some of the gravel that has been laid on the descent is wearing away, making it more bumpy than it has been.
Sep 15, 2018 @ 4:22pm
Sep 15, 2018
Summit Ascent
Sep 15, 2018 @ 4:22pm
Sep 15, 2018
Dew Lakes track
Jan 4, 2018 @ 3:57pm
Jan 4, 2018
Open reporter
more reports »
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