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: http://jeffco.us/parks/documents/parks-and-trails-documents/open-space-system-map/

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.

 

Big Ring Fat Bike Race #3

Sunday
12
Mar, 2017

Big Ring Fat Bike Race #3

Race at Aldefer/3 Sisters Park and get fat!

Big Ring Fat Bike Race #2

Sunday
12
Feb, 2017

Big Ring Fat Bike Race #2

Race at Meyer Ranch and get fat!

Big Ring Fat Bike Race #1

Sunday
8
Jan, 2017

Big Ring Fat Bike Race #1

Race at Flying J Ranch Park and get fat!

Dakota Ridge Trail Build #10

Wednesday
21
Dec, 2016

Dakota Ridge Trail Build #10

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #9

Wednesday
14
Dec, 2016

Dakota Ridge Trail Build #9

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #8

Wednesday
7
Dec, 2016

Dakota Ridge Trail Build #8

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #7

Wednesday
30
Nov, 2016

Dakota Ridge Trail Build #7

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #6

Wednesday
16
Nov, 2016

Dakota Ridge Trail Build #6

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #5

Wednesday
9
Nov, 2016

Dakota Ridge Trail Build #5

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build #4

Wednesday
2
Nov, 2016

Dakota Ridge Trail Build #4

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build 3

Wednesday
26
Oct, 2016

Dakota Ridge Trail Build 3

Shape a new black diamond mountain bike trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

Dakota Ridge Trail Build 2

Wednesday
19
Oct, 2016

Dakota Ridge Trail Build 2

Shape a new black diamond mountain-bike specific trail by building sustainable rock structures such as bank turns, rock walls, steps, and drops. Lunch is provided.

South Dakota Ridge Bike-Specific New Trail Build

Wednesday
12
Oct, 2016

South Dakota Ridge Bike-Specific New Trail Build

Shape optimized trails for mountain bikes by building sustainable rock structures such as bank turns, rock walls, steps, and drops.

Bike Optimized Trail Work with JCOS

Wednesday
24
Aug, 2016

Bike Optimized Trail Work with JCOS

 

Come join us for some sweet singletrack building with Colorado Mountain Bike Association and Jefferson County Open Space Trails Stars.

Bring your: boots, water, snacks, rain gear, TP, and good attitude. Lunch will be provided by our friends at JCOS.

Announcing JOMBA and SWOT

COMBA's Trail Team is working with Jefferson County Open Space to help them understand the needs of mountain bikers and for COMBA to better understand JCOS's needs. It's a great partnership formed over many years, loads of meetings, and many outings. We are now at the point in the relationship where JCOS trusts COMBA to create better, bike friendly trails throughout their system. What does this...Read more
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