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Hamilton Island


Hamilton Island (approx 35 miles east of Portland ) lies along the Washington shoreline of the Columbia River, upstream of Beacon Rock, and downstream of Bonneville Dam near Cascade Locks. Hamilton Island used to be an island; however, it is now a peninsula. In the 1970s the upper part of "Hamilton Slough", bordering the northeast side of Hamilton Island, was filled in with debris from the construction of Bonneville's North Powerhouse. The lower part of Hamilton Slough became part of Hamilton Creek, which borders the west and northwest side of Hamilton Island. On the southeast and south is the Columbia River. The terrain is mostly wide open with scattered copses, and you can run. There is one large low hill to go around or climb multiple times!!! There are marshy areas, some thickets, and shorelines. You can enjoy beautiful river gorge views.

Meeting place is being determined; please check back for details.


  • Registration 10:30 am - 12:45 pm
  • Beginner Instruction Clinics 11:00 am - 1:00 pm as needed
  • Intermediate Workshop: Topic TBA - 10:00 a.m - 10:45 a.m.
  • Course starts 11:00 am - 1:00 pm
  • Courses close 3:00 pm

All teams must check out through the course finish gate before leaving the park, even if the team does not finish the course or returns after the course closes.



  • Beginner  (about 3 Km, 9 controls, simple navigation, one easy climb,  on-trail and near-trail navigation)
  • Intermediate (about 4.4 Km, 11 controls, some hill climbing,  on-trail and near-trail navigation)
  • Technical (about 4.9 Km, 14 controls, route choices, moderate climbs, many off- trail controls)
  • Advanced  (about 7.2Km, 18 controls, some long legs, complicated route choices, opportunities to run, elevation gain and mostly off-trail navigation)


Electronic scoring (e-punch) will be used on all courses. Each participant or team receives a course map and a control description sheet. All participants must register and sign the liability waiver before entering the course.

Fees for this event are:

  • $17 - individual (non-member)
  • +$5 - any additional persons in your group
  • kids ages 9 and under are free
  • youth groups / scout groups: $10 per team
  • subtract $5 for CROC members
  • subtract $5 for using your own epunch

Become a CROC member   -   Buy your own epunch



See a map of a previous event here.



All CROC orienteering events are put on by volunteers, and the meet director can almost always used some extra hands. Please keep in mind:

  • No prior experience is needed for many of the tasks
  • You can help out AND still run your course of choice
  • Your entry fee is FREE if you help out with a meet!  

Typical ways to assist are: helping with starts and finishes, checking in folks at registration, and picking up control flags after the course closes.
Please contact the meet director at the email address on the bottom of this page if you'd like to volunteer at this event. For more details, see the Volunteer pages.



Results are posted to the Events & Results web page a few days after the event.



Meet director Jill and Rick McBee


Latitude longitude coordinates of event (will be posted soon)

Copy and paste these latitude longitude coordinates (in decimal degree format) into Google maps or your smart phone to get a map and driving directions to the event.


Driving directions and map to event 


Exact meeting place and directions will be posted soon.


Earlier Event: April 21
Scout-O at Champoeg State Park
Later Event: June 23
Milo McIver State Park