Mason Semmens Wins Dynamite GP; Ends Dante Oliveira’s NGPC Win Streak
Mason Semmens (KTM) led wire-to-wire at the Dynamite Grand Prix at Cache Valley MX Park in Preston, Idaho, finishing roughly 12 seconds ahead of Dante Oliveira, with Dare DeMartile third. It was Round 7 of the Rocky Mountain ATV/MC AMA National Grand Prix Championship, co-sanctioned with WORCS, per Cycle News's August 31, 2026 report.
Trail Roamer Editorial TeamAug 31, 2026 · Updated · 1 min readWestern U.S. off-road GP racing returned to the headlines August 31, 2026, when Cycle News published Round 7 results from the Dynamite Grand Prix at Cache Valley MX Park in Preston, Idaho.
The event was co-sanctioned under the Rocky Mountain ATV/MC AMA National Grand Prix Championship and WORCS. Mason Semmens (KTM) led wire-to-wire and finished about 12 seconds ahead of Dante Oliveira, ending Oliveira’s NGPC win streak. Dare DeMartile took third.
Multi-org entry produced large class fields per the same report. Trail Roamer treats WORCS/NGPC as secondary to GNCC and National Enduro, but a clean Western GP result still belongs in the racing feed for dual-sport and off-road readers who follow desert/GP formats.
The podium below follows the published Pro overall order from Cycle News.
Results
NGPC / WORCS · Round 7 - Dynamite Grand Prix (Preston, ID)
Pro Overall
- 1
Mason Semmens
KTM
- 2
Dante Oliveira
- 3
Dare DeMartile
Sources
- 2026 NGPC/WORCS Round 7 Results - Cycle News · accessed Sep 4, 2026
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