U-Max is a DIY orienteering format, see website above for the style. Print your own maps prior from the website - there are two. www.mapsport.co.nz/hvoc/melling11upstream.pdf and www.mapsport.co.nz/hvoc/melling11downstream.pdf. If you haven't got a printer come anyway and ask someone for their spare. Bring pen and minigrip bag.
The riverbank is always changing, and recent erosion control has made some interesting changes in the 2.4km Melling-Avalon section. The willows which are clear underneath in the winter have spring growth which cuts down the visibility, but there are interesting features in there! The recently upgraded city centre is also close, depending on the wishes of participants. Debrief suggested at Mediterranean Food Warehouse after.