Is Metal Detecting allowed in Colorado state parks: YES, with permission from the park manager.
Metal detecting is allowed at the discretion of the park manager. Check with each park manager before hunting to obtain permission and the individual park rules. Individual park managers do have the authority to restrict use in certain areas if there is a threat to the resource but these restrictions are rare and will be clearly posted at all entrances to the area.
Otherwise the only limiting Park Regulation is: Find Link HERE:
Chapter 1, Article 1, #100 (b)(1 and 2)
It shall be prohibited:
1. To enter, use or occupy Parks and Outdoor Recreation Lands when same are posted against such entry, use or occupancy. (Access to Parks and Outdoor Recreation lands and waters is generally allowed between 5:00 a.m. and 10:00 p.m. daily. Restricted access generally will be allowed during other hours for camping and fishing.)
2. To remove, destroy, mutilate, modify or deface any structure, water control device, poster, notice, sign or marker, tree, shrub or other plant or vegetation, including dead timber and forest litter, or any object of archaeological, geological, historical, zoological or natural/environmental value or interest on Parks and Outdoor Recreation Lands. (This regulation does not include removal of firewood from designated firewood areas, noxious weeds as defined by statute, or recreational gold mining within the Arkansas Headwaters Recreation Area, except where prohibited as indicated by posted signs.)
Other related rules like park pass requirements, hours of use, registered historical site restrictions etc.. always apply.
FMDAC Disclaimer: FMDAC assumes no responsibility for any person who knowingly or accidentally violates any state park regulation. Although FMDAC will try to keep this information current we cannot anticipate how each regulation will be interpreted by a specific park department, park employee or other government employee. It is the sole responsibility of each individual to know and obey the regulations of the park or area they are visiting and or metal detecting.