William O'Brien State Park - Activities

Contact Information


  • Park permits: $25 annual, $18 second vehicle, $12 handicapped. Camping fees are separate.


More Information


  • The park is located on State Hwy 95, two miles north of Marine on St Croix.

Other Date Information

  • Book an online reservation 24 hours a day. Phone reservations can be made by calling 866-857-2757 (TTY: 952-936-4008) between 8 a.m. and 8 p.m. daily November through March, and from 8 a.m. to 8 p.m. daily April through October. Call Ctr closed holidays.

Attraction Attributes

  • Accessible to Disabled
  • Can Accommodate Groups of 45 or more

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Also at this Location

  1. William O'Brien State Park

    16821 O'Brien Trail N
    Marine On St Croix, MN 55047
    Call: 651-433-0500

    William O’Brien State Park, on the beautiful St. Croix River, is a great place for everyone to come and enjoy the outdoors and the recreation it provides. Park activities include: hiking, cross country skiing, fishing, swimming, camping, canoeing, picnicking, naturalist programs and special events. We have 124 campsites, four group camps, and 4 camper cabins. If you have any questions you can call the park office at 651-433-0500.

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