Spectators can walk or ride to the race HQ at Radio Hut Rd - known to locals as the Challenge Block. But if you want to take the easy route there will be a shuttle bus picking up from Longmile Rd for a gold coin.
Ms Dimozantos said the course was the same as last year, with all tracks in the Challenge Block.
The start and finish line is at the intersection of Radio Hut Rd and the horse track. Riders will go in a clockwise direction taking in Down the Guts, Challenge Uphill, Boulderdash and Rock Drop before racing along the Mudpool Rd and uphill along the horse track to the finish. The elite men will race seven laps and the elite women six.
The first age-group race will start at 10.30am with the final, elite, races at 2pm.
Details
What: 2015 Mountain Bike National Championships
Where: Radio Hut Rd, Whakarewarewa Forest
When: Tomorrow from 10.30am
How Much: Free, but shuttle bus costs a gold coin