The venue for Saturday is on hilly farmland and pine forest at 1057a Makirikiri Valley Rd, Upokongaro. It will be signposted from State Highway 4.
The site for Monday's racing is signposted from Moonshine Rd, Judgeford, Porirua.
The outright champion last season was Cambridge's Dylan Yearbury, with close friend and fierce rival Tommy Buxton, from Helensville, forced to settle for the runner-up spot. And it's possible that Yearbury will be a force to be reckoned with this time around too.
Buxton is currently racing overseas, so he won't be a feature at the enduro nationals this year.
Former national dirt bike champions Jake Whitaker (Wainuiomata) and Seth Reardon (Whanganui) are a couple of riders who should also be among those challenging for the win. Whitaker won the New Zealand Extreme Off-Road Championships in 2019 and Reardon was national enduro champion in 2019.
However, these riders can take nothing for granted, with Manawatū's former United States cross-country champion Paul Whibley, Oparau's just-crowned national cross-country champion James Scott, Tommy Watts (Wairoa), Wil Yeoman (Taupō) and Ethan Harris (Rotorua) also likely title contenders.
Yearbury, Reardon, Scott, Watts and Yeoman will also be using the enduro nationals to tune themselves up for their racing at the annual International Six Days Enduro (ISDE) event in France later this year.
Others to watch out for this weekend include Josh Houghton (New Plymouth), Richard Sutton (Drury), Jake Wightman (Tokoroa), Josh Hunger (Stratford), Bradley Lauder (Rotorua) and veteran Tony Parker (New Plymouth), to name just a few.
Motorcycling New Zealand enduro commissioner Justin Stevenson said he was "looking forward to a thrilling Queen's Birthday weekend", with the double-header situation certain to be a stern test.
"We wanted to run an intense, quick-fire series to help boost and strengthen the riders who are in training to contest the ISDE in France in August-September," he said.
"It is also interesting to note that Seth Reardon's late father, Brian, won the enduro when it was last staged at the Upokongaro venue in 1985."
The 2022 Yamaha NZ Enduro Championships are supported by Mitas Tyres, Macaulay Metals, Best Build Construction, Silver-bullet and Kiwi Rider magazine.
2022 NZ Enduro Champs calendar
Round 1 – Saturday, June 4 – Whanganui
Round 2 – Queen's Birthday Monday, June 6 – Porirua
Round 3 – Sunday, June 12 – Martinborough