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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.

As it's meet director Jill’s birthday, and there will be CAKE. 

Due to US Corps of Engineers regulations, fees cannot be collected on Hamilton Island. Thus, no fees will be collected for this event and it's FREE.



  • Registration 10:30 am - 12:45 pm
  • Beginner Instruction Clinics 11:00 am - 1:00 pm as needed
  • Intermediate Workshop: Handrails and Attack Points - 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. 


Intermediate Workshop: Handrails and Attack Points

Learn how to locate a control using land features and vegetation, and how to key in once you’re close. Intermediate workshops are for people who want to up their skills beyond the Experienced Beginner level. Meet at the registration area at 10:00.



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.



The event is free open to the public. Donations are accepted are appreciated to help offset event costs.



Meet director Jill and Rick McBee


Driving directions and map to event 

Please note the start is in a different location to events held here in the last two years.

Note: We will not post signs on Hwy 14 as they disappear!!! 

Start is on south side of Hamilton Island peninsula.

  1. From Portland, take I-84 East to Cascade Locks (Exit 44).
  2. Take Bridge of the Gods (toll $2) over the Columbia River to the Washington side.
  3. Turn left on Hwy 14.
  4. Go 3.1 miles downriver, past the dam on your left. 
  5. Turn left onto Dam Access Road. 
  6. Take an immediate right onto Fort Cascades Drive. 
  7. Follow road 1.2 miles to shoreline and registration in parking area on left.
  8. Restrooms are 500 meters east and west of start along shoreline.