For 2021, we’re keeping with a Halloween theme, but we’re swapping out our annual Vampire-O at night for a Skeleton Bones event during the day. Due to the continued presence of the COVID-19 pandemic and the fact that Vampire-O usually draws a lot of kids (too young to be vaccinated), we felt that the mass start and punchcard-swapping format wasn’t an ideal event this year. We hope to have Vampire-O back for October 2022.

The Choose Your Adventure Series is meant to be fun, social, friendly for beginners, yet interesting for seasoned veterans.  Who will visit the most “skeleton bone” checkpoints within the time limit? Who will run the fastest?

This format is great for beginners! With many checkpoints along trails and open areas, you’ll be sure to visit a lot! And if there’s one that’s hard to find, don’t worry, you can skip it and keep going. For the advanced navigators, the races will be a challenging exercise in figuring out the most efficient and optimal route to try to get them all

If you need a waiver to print and sign for a youth attending without parent/guardian, download here.


Like most Choose Your Adventure events, there are 24 checkpoints to find in the park, split in half so that 12 are on Map 1 and 12 are on Map 2. You have 75 minutes, and you can start anytime between 10:15am and 12:15pm.

But here’s the Skeleton Bones twist!

The 12 checkpoints on each map are actually 6 pairs of 2 checkpoints (each pair resembles the shape of a dog bone). Once you visit 1 of the 2 checkpoints of a “bone”, you then must go next to its pair checkpoint, completing the “bone”. After completing a bone, you may go visit any other bone. You can visit the 6 bones in whatever order that you like. You can start each bone from either checkpoint, as long as you go to the other one next.

Once you complete the 6 bones (12 checkpoints total) from the first map, come back to the start/finish area and we’ll give you another 6 bones to visit!

Here’s an example of the format from our 2019 “Dog Bones” event at Edmonds College.

How does the scoring work?

All 24 checkpoints are worth the same amount: 1 point per checkpoint. The maximum score is 24 points. The first person or team returning with 24 points wins!

There’s a time limit of 75 minutes, and for every minute late, there’s a 1 point penalty.

Note for the map exchange: If you skipped any checkpoints from the first map, you cannot go back and get them once you take your second map. (This rule is to prevent an unfair advantage by collecting both sets of checkpoints during one loop.)


10:00am – Registration & Instruction Opens
10:15am – Start Window Opens
12:00pm – Registration & Instruction Closes
12:15pm – Start Window Closes
01:30 pm – Finish & Course Closure

You can start any time between 10:15am and 12:15pm. Before you start, you will be allowed up to 5 minutes to study Map #1 and plan your strategy!


$17 base price
– subtract $5 for CascadeOC members
– subtract $5 for using your own e-punch

$20 base price
– subtract $5 for CascadeOC members
– subtract $5 for using your own e-punch

Become a member for $5-20

Buy your own e-punch here.

What’s an e-punch?

An e-punch records your race. At each control, you’ll dip the e-punch into an electronic box, which will beep and flash as confirmation. After you finish, you’ll download the e-punch at the download tent and get a receipt that show which controls you visited and how long you took between each; these are your “splits.”

Part of the fun of orienteering is comparing your splits with people who completed the same course, and discussing the routes you took!


Online pre-registration closes: Thursday, October 28, 9:00PM

Day-of-event registration is available by cash or check, made payable to Cascade Orienteering Club

Learn more about volunteering

Volunteers make these events happen! You can volunteer and participate on the same day, plus earn volunteer points to earn a free meet.



Looking for a carpool? Join the CascadeOC Google Group and share your request to find a ride.


Robinswood Park is a fantastic venue for beginners, thanks to distinct features in the landscape, such as well-groomed trails, a well-defined pond, buildings, open grassy areas, and paved paths.

Read more on the map page

Navigational Challenge: 2/10

Physical Challenge: 2/10


Return to the Finish
All participants MUST return to the finish and download their e-punch or turn in their punch card.

Even if you have not finished your course, you must still return to the the finish and confirm with event staff that you have returned safely.

Out of Bounds
Some areas may be marked out of bounds. It is imperative to respect these boundaries to maintain our relationships with land managers. Participants MUST NOT go out of bounds. Any participant caught going out of bounds will be disqualified.

Course Closure
All participants MUST return to the finish by course closure time. If a participant does not return by course closure, event volunteers will begin coordinating a search party.

If you need a long time on the course, start as early in the start window as possible, wear a watch, and be prepared to cut your course short to make it back by the course closure time.

All participants MUST carry a whistle on the course. Complimentary whistles are available at the start tent (please only take one).

If you are injured on the course and need assistance, blow three long blasts to call for help.

If you hear a call for help, abandon your course to find the person in distress.

Part of the fun and fairness of orienteering is navigating your own course, so please be polite when you find a checkpoint and don’t holler that you’ve found it.