UPDATE: Round 4 has been postponed because of weather and will take place on July 1.

The weather should break in time for Round 4 of the 2018 MotoSport.com PacWest Motocross series which heads to Washougal MX Park - America's Most Scenic Raceway - on Sunday.

Washougal already gives riders a chance to compete at a Championship level as the track hosts Round 9 next month of the Outdoor Nationals but with a weekend long rain storm moving into the area expect the challenge level to rise for the 34 racing classes ranging from 5cc beginner to 450 pro.

Last time out, nearly 200 riders lined up behind the gates for Round 3 at Airway MX under sunny skies just outside Spokane, WA. A storm rolled in for the last few Motos though giving riders a taste of what to expect on Sunday. Despite the forecast this weekend which includes periods of sun on race day and just a shower chance, organizers expect one of the largest fields yet because of the allure of Washougal and the proximity to Portland and Seattle based riders.

"Riders are really liking the practice Saturday and race Sunday format. It gets them ready to race and comfortable with the jumps and obstacles the track presents," said Brian Nilsen, co-founder of the racing series with former pro Ryan Villopoto. "Pac West MX is pumped to be heading to Washougal for Round 4 where Ryan Villopoto will be making an appearance. Come down to the premiere track in the Northwest and let's go racing!"

Doors open for practice at 7 a.m. on Saturday (weather permitting) and for racing at 8 a.m. Sunday at Washougal MX Park, 0205 NE Borin Road in Washougal, WA. The optional practice day costs $35. Race fee costs $35 plus a one-time $35 membership fee (if not paid at previous rounds) and a $15 entry fee charged by the track. Riders must race in a minimum of six rounds to qualify for year-end awards. Check out Washougalmxpk.com for more information on this weekend's race or PacWestMX.com for information on the seven round series.

Before you go make sure you're ready to ride with the MotoSport.com Pre-Ride Checklist.