Jefferson County Open Space

Jefferson County Open Space (JCOS) manages one of the greatest open space park systems in the country. The abundance of parks and trails is the reason many of us have chosen to live in the Colorado Front Range. The open space properties are cherished by mountain bikers for their wealth of local riding opportunities and, as a result, bicyclists make up approximately half of all the visitors to the parks.

Maps of all the open properties in the park system can be found on this PDF:

The open space park system started as a citizens' movement led by PLAN Jeffco. After heavy campaigning by 400 PLAN Jeffco volunteers, the Jefferson County voters approved taxing themselves 0.5% to fund the purchase of open space on November 7, 1972.  Jefferson County Open Space was born. The parks and their funding have had to be defended by the citizens of the county several times since 1972.

In addition to these staff members, the  Open Space Advisory Committee (OSAC), a citizens' advisory board, makes recommendations regarding Open Space policy and procedures to Jefferson County's Board of County Commissioners. OSAC holds monthly meetings, open to the public, and are on the first Thursday of each month, beginning at 7 p.m. in the Ponderosa Room of the Jeffco Open Space Administration Building, Suite 100, 700 Jefferson County Parkway, Golden, CO 80401.

COMBA regularly interacts with all of these groups to help ensure the preservation of the open space park system and mountain bikers' access to these properties.


Jeffco Open Space to Host Second ‘Trails Talk’ Forum

Oct, 2014

Jeffco Open Space to Host Second ‘Trails Talk’ Forum

Join Jeffco THIS Wednesday to discuss New Trail Updates, Apex Opening and Flood Recovery, and Working Group Update.

Final Women's Ride, North Table, Sept 16th

Sep, 2014

Final Women's Ride, North Table, Sept 16th

The final women's ride is Tuesday, September 16th at North Table Mountain, located in Golden at 5:15 pm at Tony Grampsas Memorial Sports Complex, then we will ride over!

Women's Ride #3, Elk Meadow, July 15th

Jul, 2014

Women's Ride #3, Elk Meadow, July 15th

Come join the women of COMBA on an all-levels mountain bike ride, Tuesday, July 15th. 

Beginner Ride #3, Flying J Ranch Park, July 12th

Jul, 2014

Beginner Ride #3, Flying J Ranch Park, July 12th

The monthly beginner ride is Saturday, July 12th at Flying J Ranch Park at 9:00 am. Are you new to mountain biking and our incredible Colorado trails? Join COMBA on a friendly "NO DROP" ride paced for beginners on nearby front range trails. Experienced COMBA ride leaders will lead and follow the group, providing skills guidance along the way.

JCOS Meeting will Address Open Space Flood Recovery, Tuesday, November 19, 2013

The extreme flooding in Colorado caused severe trail damage and the subsequent closure of several trails, and two Jeffco Open Space Parks in their entirety. As extensive repair work has taken place and volunteer efforts have aided in the recovery, only one park ( Apex Park ) will remain closed into 2014. Jeffco Open Space is holding an information meeting to discuss the status of flood recovery...Read more

MiniCrew, Thursday, North Table Mtn, July 18, 2013

Minicrew will be working this Thursday, July 18th . Due to recent torrential rains in Jefferson County, Minicrew has been asked to help repair some of the washed out parts of North Table Loop Trail. We will be meeting this Thursday at Tony Grampsas Memorial Sports Complex 4471 Salvia St, Golden, CO at 5:30 pm. We will enter the park from the east side, along Easley Road. Parking will be at Tony...Read more

Trailwork with MiniCrew - Windy Saddle Lot, June 20, 2013

When: Thursday, June 20, 2013 Where: Windy Saddle Lot, Chimney Gulch Trail Golden, CO Look for the tools in the parking lot! MiniCrew is a group local mountain bikers in Jefferson County, Colorado that created a volunteer program to assist in the maintenance on JeffCo Open Space Trails. The Mini Crew Program is designed as an after-work-couple-of-hours volunteer opportunity. Meeting on the 3rd...Read more

Pedal Pushers Cyclery Grand Re-Opening, Saturday May 4, 2013

Pedal Pushers Cyclery is having their grand re-opening in the new location in one week, Saturday, May 4th from 10 am through 5 pm. Located at 710 Golden Ridge Rd in the Golden Ridge shopping Center near the intersection of Hwy 6 and Heritage Rd. Just minutes from Apex park and the new West Rail. Moots, Scott Bikes, Feedback Sports, Royal Clothing and Jett Clothing will be there! Festivities will...Read more

Apex Park Trailhead Project 2013: Input Needed!

Come out tomorrow night for a Community Open House Event: Tuesday, April 2, 5:30 - 7:30 pm -- Neighborhood/Public Open House, Jefferson County Open Space offices, 700 Jefferson County Parkway, Suite 100, Golden, CO 80401 Wednesday, April 17 – Comments due. Submit comments either at the community/neighborhood meetings or by email at Public input does matter, and now is the time...Read more

Let’s Help JCOS Finish North Table Mountain – September 15, 2013

Help us this Saturday, please register now! Jefferson County Open Space Parks is bound and determined to complete the new trail work on North Table Mesa this year and COMBA is pitching in to do what we can to help them accomplish their goal. On Saturday, September 15th, we will be joining with JCOS for trail work at NTM. Most of the work will be in the dirt but I hear there may be some possible...Read more

Share the Trail Event, September 11, 2013

Join COMBA and Jefferson County Open Space to the September Share the Trail Event , on September 11 from 4-7 pm at the Mayhem Gulch Trailhead to ride Centennial Cone . Meet other trail users & our friendly rangers to promotes responsible riding and trail etiquette. Read more in the YourHub section of the Denver Post. Where: Mayhem Gulch Trailhead. From Golden, the trailhead is between mile...Read more
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