Walker is the brother of Olympic BMX silver medallist Sarah Walker.
Sharing the limelight, 2015 Queen of Crankworx Anneke Beerten (Netherlands) proved her mettle, charging in to win the women's title.
Beerten admitted she was thrilled to have the monkey off her back, so to speak, with the win kick starting her 2016 season.
"I thought it was pretty cool ... we had enough time between transfers. It was nice, with the whole group of girls we had riding together, the vibe was amazing."
Rotorua's Annika Smail also made her way onto the podium, finishing third. When interviewed halfway through the racing, Smail said she thought she had no chance of mixing it with the top riders.
"I don't think I will be anywhere towards the top but I'm having fun," she said.
Rotorua couple Carl Jones and Kate O'Neill also performed strongly during the event, finishing fifth in the men's and women's races.
Enduro racing mixes aspects of downhill and cross country mountain biking and is split into stages. The racing was held in the Whakarewarewa Forest and under the gondolas on Mt Ngongotaha.
Giant Toa Enduro results:
Men: 1 Matt Walker (NZL) 35:06 minutes, 2 Eddie Masters (NZL) 35:31, 3 Josh Carlson (Aus) 35:34, 4 Sam Blenkinsop (NZL) 35:42, 5 Carl Jones (NZL) 35:42.
Women: 1 Anneke Beerten (Netherlands) 40:38 minutes, 2 Rae Morrison (NZL) 40:52, 3 Annika Smail (NZL) 41:14, 4 Vanessa Quin (NZL) 43:01, 5 Katie O'Neill (NZL) 00:43:28.
Crowd favourite:
* The Oceania Whip-Off Championships has proved a huge hit at Crankworx Rotorua, with spectators turning out in their thousands to watch riders take on a 3.5m-tall jump.
* The whip-off event was staged last night under the gondolas on Mt Ngongotaha with riders dropping off a huge platform before hitting the large jump at speed.
* Each rider was judged on their best whip - which basically sees each rider turn their bike sideways while in mid-air. The crowd lapped up the event with plenty of cow bells and cheers ringing around the venue.
* A total of 2500 locals attended the event, with Rotorua residents getting in free.
* Ryan Howard (US) won the best men's whip-off, while Casey Brown (Canada) won the women's whip-off.