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General GCO Meet Details - how most meets work

Registration for most GCO events opens at 8:30 a.m. and closes at 10:30 a.m. Starting times are assigned from 9 to 11 a.m. Beginner Instruction is offered as requested. Courses close at 1.00 p.m.


Our fees: $10 for each adult and $5 for each child or youth (ages 7-18) for non-members and $8 for adults and $4 for children or youths for members of GCO or other Orienteering clubs.

A second course is $2 per person. You can also rent a compass for $1.

You can save time, particularly for groups, by filling out a Registration Form (left). Use ONE form for each individual or team going out together.

All upcoming GCO events

(and BAOC and Terraloco events of local interest)

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April 25th (Sat) Rocklin Urban / Park Score-O, Rocklin, CA

New location! New map! New adventures! Kris and Rex are putting together a brand new map for Old Town Rocklin and the nearby parks with brand new navigation challenges and sights to enjoy.
Score-O (Scoring orienteering) means you try to find as many checkpoints as you can and return to the start/finish withing a in time limit. This time it's 90 minutes since getting all the check point will require > 10 km of running.

Start location: Johnson Springview Park

10:00 Registration starts
10:30 Score-O mass start
12:00 Score-O finish

Event Director: Kris Anderson, Mapper / Course Setter: Rex Winterbottom

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May 9th (Sat)- GCO Marshall Gold State Park

Score-O event with mass start - 90 minutes and 20-40 checkpoints, 310 Black Street, Coloma, CA 95613, off Hwy 49 between Coloma and Placerville: Marshall State Park

Please use xxxx Parking Lot, $10 State Park parking fee applies, self pay kiosk in the parking lot.

You can run individually or as a team. There is no pre-registration, but you can fill out the registration form linked above and bring it, or register at the event.

9:00 Registration opens
9:30 Beginner orientation talk
10:00 Mass start
11:30 Finish without penalty
12:00 Course closes
Snacks and socializing

Questions: Event Director / Course Setter = Danny Lulla, misterlulla@gmail.com

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June 28th (Sun) - GCO Mississippi Bar, Fair Oaks, CA

Classic orienteering with 5-6 courses of different length and skill level to choose from.

Snowberry Creek Assembly area, 4857-4872 Maine Av., Fair Oaks, CA 95628.
More location info: Mississippi Bar, Sacramento

You can run individually or as a team. Classic pin punches and punch cards are used.

8:30 Registration opens
9:00 First start
10:30 Registration closes
11:00 Last start
13:00 Courses closed and control pick up begins

Event Director / Course Setter = Ryan Zahner

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September 12th (Sat) -American River College Campus

Short form event (45-60 min ) exact format (Score-O or racing loop TBD).
Address: 4700 College Oaks Driver, Sacramento 95841

More details to follow

Course Setter: Nik Weber.

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October 18th (Sun) - GCO Rossmoor Bar

There will be 5 different fun and challenging courses for all skill levels at Rossmoor Bar, a relatively open floodplain woodlands in the American River Parkway. Everyone is welcome, including beginners with free beginner instructions available!

RED: 5.0-7.0 km, 10-20 controls
BROWN: 2.5-4.0 km, 6-14 controls
ORANGE: 3.5-5.0 km, 7-15 controls
YELLOW: 2.0-3.0 km , 7-12 controls
WHITE: 1.5-2.5 km, 5-10 controls

Red, (Green) and Brown = Advanced = Lots of route choices, and small features as check points
Orange = Intermediate = Maybe route selection, and check points near distinct features
Yellow = Advanced beginners = Mostly on trails, but the check points can be off the trails
White = Easy beginners = Completely on trails or along distinct features (like a fence lines)

From U.S. Highway 50, take the Sunrise Blvd. off-ramp, heading north. Turn left onto Coloma Road.
Turn right on EL Manto Drive (If you take Rossmoor Drive you'll end up at the wrong parking lot!) to access the parking area in the east side of the park next to the river.

Parking: Sacramento County Park Permit or $7 per Vehicle, payable in cash in an envelope at the entrance.

Course Setter: Jonas Libell, Event Director:

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November 15th (Sunday) - GCO Sacramento Bar

Classic orienteering event with 5 courses centered on the Sacramento bar north of the American River.

WHITE: 1.5-2.5 km, 5-10 controls, beginners, all controls are along the trail or distinct features
YELLOW: 2.0-3.0 km , 7-12 controls, advanced beginners, controls are visible from trails or large features
ORANGE: 3.5-5.0 km, 7-15 controls, intermediate, some route selections, controls near distinct features
BROWN: 2.5-4.0 km, 6-14 controls, advanced, small features.
RED: 5.0-7.0 km, 10-20 controls, advanced like brown but longer legs and more varied and challenging terrain

Getting there, About Sacramento Bar Park.

8:30 Registration opens
9:00 First start
10:30 Registration closes
11:00 Last start
13:00 Courses closed and control pick up begins

You can run individually or as a team. Classic pin punches and punch cards are used.
All check point have to be visited in the order they are marked. Max time is 2 hours.
There are bathrooms and water at the picnic area

Event director and course setter is Dan Rathbun

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December 27st (Sun) - GCO's X-mas O-Scramble in
Old Town Fair Oaks, CA

This year's X-mas scramble is in lovely toony Old Town Fair Oaks!

Start location: Plaza Park, 7003 Parks Dr. Fair Oaks, CA 95628.

This is on the west side of the Village Park where we started last year,
There is limited parking right there, but plenty around the park and on the streets to the south east.

10:00 Registration starts
10:30 Score-O mass start
12:00 Score-O finish
(Scramble style = find as many checkpoints as you can and return to the start/finish before the 90 min time limit runs out.)

Event Director and Course Setter: Jonas Libell

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Come and have fun with us!

More scheduled events:

  • Bay Area Orienteering Club (BAOC).
  • terraloco Urban and wild map adventures.
  • Nav-X Map Trekking Series.
  • Los Angeles Orienteering Club.
  • San Diego Orienteering.

  • Abbreviations: W = White, Y = Yellow, O = Orange, Br = Brown, Gr = Green, R = Red, B = Blue,
    ED = Event Director. CS = Course Setter.
    White and Yellow are beginner courses. Orange is intermediate. Brown, Green, Red and Blue are all advanced courses with varying lengths and physical difficulty.
    Scrambles (also known as Score-O) are mass-start events in which you find as many controls as possible, in any order, within the time limit.

    All meets are tentative, subject to park approval!! Dates might be changed for various reasons, so always check here! Look for more details on the meets closer to the date.

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