William O’Brien State Park Beach — Minnesota

Quick Facts

• Location: William O’Brien State Park, Marine on St. Croix, Minnesota
• Address: 16821 O’Brien Trail N, Marine on St Croix, MN 55047
• Beach Type: Freshwater lake beach
• Sand Type: Sandy shoreline
• Water Conditions: Calm, shallow, designated swim area
• Best For: Families, swimming, camping, nature
• Best Time to Visit: June–August; midday for warmest water
• Beach Hours: Sunrise to sunset
• Pet Policy: Dogs allowed on leash (not in swim areas)
• Beach Cleanliness: Very well maintained
• Average Rating: ⭐ 4.7
• Pricing: State park entry fee required
• Parking: On-site parking available
• Accessibility: Good
• Crowd Level: Low to moderate

Overview

William O’Brien State Park Beach offers a peaceful and family-friendly lake experience near the St. Croix River. It’s a great spot for swimming, camping, and enjoying a quiet natural setting.

Amenities & Access

• Restrooms and changing areas
• Picnic areas
• Campground nearby
• Easy access from parking

Safety & Conditions

• Calm designated swim area
• No lifeguards
• Clean and safe water
• Family-friendly

Tip: Ideal for combining beach time with hiking and river exploration.

Things to Do

• Swimming
• Camping
• Hiking
• Fishing
• Picnicking

Nearby Attractions

• St. Croix River
• Marine on St. Croix village
• Scenic river valley

Where to Stay

• State park campground
• Nearby inns and cabins
• Twin Cities accommodations

Tips & Rules

• State park permit required
• No pets in swim area
• Bring supplies
• Follow park rules

Best Time to Visit

• Summer for swimming
• Fall for scenic foliage
• Weekdays for quiet

Who It’s Best For

• Families
• Campers
• Nature lovers

Bottom Line

William O’Brien State Park Beach offers a clean and relaxing lake experience with easy access to nature and outdoor recreation.