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Adams County, CO Public Conduct: Public Alcohol Use (2026)

Light Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Adult alcohol use
Permitted in county parks, trails, open space
Under 21
Cannot possess or consume alcohol or marijuana
Marijuana
Public consumption banned for all ages
Fine
$100 civil infraction per violation
Rule
Resolution 2022-649, Rule 11(a),(b)

Summary

Adults may possess and drink alcohol in Adams County parks, trails and open space areas under Resolution 2022-649's Rule 11, but anyone under 21 may not possess or consume alcohol or marijuana there, and consuming marijuana in public is banned outright regardless of age.

City-specific rules exist: Westminster, and Thornton have their own public alcohol use rules that differ from Adams County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Possession and consumption of alcoholic beverages is permitted within Adams County parks, trails, and open space areas in compliance with Park Rules & Regulations and Colorado State Law. (a) No person under twenty-one (21) years of age shall possess or consume an alcoholic beverage or marijuana or marijuana by-product in any Adams County park, trail, or open space area. (b) No persons shall consume marijuana in a public place in any Adams County park, trail, or open space areas. ... Violation of any other Rule or Regulation adopted herein shall be a Civil Infraction as provided for in C.R.S. § 29-7-101(2), as amended, and upon conviction thereof, shall be punished by a fine of one hundred dollars ($100.00) per violation (as required by C.R.S. § 16-2.3-102(1)(a)), plus any applicable fees and surcharges, or as otherwise provided by law.

Full Breakdown

Rule 11 of the Adams County POSCA Rules and Regulations, adopted by Resolution 2022-649 on December 6, 2022, opens by stating that possession and consumption of alcoholic beverages is permitted within Adams County parks, trails, and open space areas in compliance with the Park Rules and Regulations and Colorado state law. Rule 11(a) then narrows that general allowance: no person under twenty-one years of age shall possess or consume an alcoholic beverage or marijuana or marijuana by-product in any Adams County park, trail or open space area.

Rule 11(b) separately bans consuming marijuana in a public place within any Adams County park, trail, or open space area, regardless of the user's age. The rule sits alongside Rule 12, which makes any conduct that substantially interferes with other users' enjoyment of the area, including amplified sound and noise, a general nuisance. § 29-7-101(2), punishable by a $100 fine per violation plus fees and surcharges, on top of any separate state charge for underage possession or public marijuana use.

Violations & Fines

Underage possession or consumption of alcohol or marijuana, and public marijuana use by anyone, in an Adams County park, trail or open space area violates Rule 11 and is a civil infraction under C.R.S. § 29-7-101(2), carrying a $100 fine per violation plus fees and surcharges. Underage alcohol possession can also draw a separate charge under state minor-in-possession law. Park Rangers and sheriff's deputies can issue a penalty assessment notice or citation for any Rule 11 violation.

Frequently Asked Questions

Can adults drink beer at an Adams County park?
Yes. Rule 11 of Resolution 2022-649 permits adults to possess and consume alcoholic beverages in Adams County parks, trails and open space areas, as long as they comply with the Park Rules and Colorado state law, including open-container rules on roadways and parking lots.
Is it legal for a minor to have a beer at a county park?
No. Rule 11(a) bars anyone under twenty-one from possessing or consuming an alcoholic beverage, marijuana, or a marijuana by-product in any Adams County park, trail or open space area, and violating it is a civil infraction on top of any state minor-in-possession charge.
Can I smoke marijuana in an Adams County park?
No. Rule 11(b) bans consuming marijuana in a public place within any Adams County park, trail or open space area for every age group, separately from the age-based alcohol and marijuana possession limit in Rule 11(a).

Sources & Official References

Other rules in Adams County

All Adams County rules

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Public Alcohol Use in Cities Across Adams County