The Minnesota Department of Natural Resources (DNR) stated the Walter F. Mondale Day Use Area at William O'Brien State Park in Marine on St. Croix will open to visitors on May 1, while the ...

On May 1, the Minnesota Department of Natural Resources (DNR) says it will reopen the Walter F. Mondale Day Use Area at William O’Brien State Park. A day later, on May 2, the Riverway Campground ...

Construction at William O’Brien State Park will add accessible campsites, a canoe and kayak launch, trail upgrades to better accommodate wheelchairs and new restrooms. Previous upgrades to this ...

In a social media post, High Springs Fire Rescue announced that a controlled burn will take place at O’Leno State Park and will start at 8:15 a.m. on Friday.

William O’Brien State Park in northern Washington County is slated to undergo a major makeover in 2023 and 2024 in order to provide additional accessibility and updated amenities.

In 1947, 20 years after O'Brien's death, his daughter Alice O'Brien donated 180 acres along the St. Croix riverfront to be developed as a state park in memory of her father.