Reardon is favoured to take the main title when it all wraps up on Saturday afternoon, the 21-year-old currently enjoying a massive 23-point advantage over nearest challenger Taylor.
"The two courses this weekend will feature forestry and farm tracks, creek beds, swamp, old logging tram roads, stock and deer trails and should be both challenging and enjoyable for the riders," said Motorcycling New Zealand enduro commissioner Justin Stevenson.
"The venue will have a bit of everything and there is lots of shingle on the course, so it probably won't matter too much if it's wet. There's plenty of clay and mud too, so riders should not expect a nice, dry track.
"Friday will be a normal format enduro, but Saturday will be a sprint format, with longer terrain tests."
All rounds count for the "overall" series winner, but only six of the seven rounds are to be counted for the various class titles.
Leading riders in the various classes so far are Reardon (E1, up to 200cc 2-stroke, up to 300cc 4-stroke); Stratford's Josh Hunger (E2, 201cc+ 2-stroke); Whitaker (E3, 301cc + 4-stroke); Whangārei's Adrian Broughton (Vet 1, 40yrs +); Thames' Natasha Cairns (women); Masterton's Philip Bly (Vet 2, 50-54yrs); Auckland's Jeff Van Hout (Vet 3, 55yrs +).
New Zealand Top Trail Riders Championship leaders are Tokoroa's Nick Wightman (TTR1 up to 200cc 2-stroke, up to 300cc 4-stroke); Pakotai's Josh Alexander (TTR2 201cc + 2-stroke, up to 301cc+ 4-stroke); Hamilton's Adrian Revell (Vet 4 40yrs +).
The 2019 Yamaha NZ Enduro Championships are supported by Mitas tyres, Macaulay Metals, Best Build Construction, Silver-bullet, Kiwi Rider magazine, Dirt Rider Downunder magazine and Moto Events NZ.