but people can really just go to the woods and shoot?
Yep, so long as you are on National Forest Land and not private land or National Park. Some restrictions apply
such as not shooting across a road, within X yards of a campsite or structure, ensuring a proper backstop, picking up you brass. Best bet to get the rules is to contact the Ranger Station for the forest you are interested in shooting. Lakewood? Off the top of my head, that closer to Pike and it is Roosevelt (which is near me, North of Denver).
Pike:
http://www.fs.fed.us/r2/psicc/
Roosevelt:
http://www.fs.fed.us/r2/arnf/
Ahhh...here is the page for Pike
RECREATIONAL SHOOTING ON THE
PIKE & SAN ISABEL NATIONAL FORESTS,
CIMARRON & COMANCHE NATIONAL GRASSLANDS
If you are looking for a place to target shoot on the local national forests and grasslands, here are some helpful hints to make your experience safe and enjoyable.
In general, recreational shooting is not prohibited on most National Forest System lands. However, discharging a firearm is always prohibited within 150 yards of a residence, building, campsite, developed recreation site, a cave, across or on a road or a body of water, or in any manner or place whereby any person or property is exposed to injury or damage. (36 CFR 261.10(d).
Areas Closed To Target Shooting:
Areas closed to target shooting on the Pike National Forest include:
The area in Manitou Park along highway 67 from the Experimental Forest south to the forest boundary (Pikes Peak Ranger District),
The Rampart Range Road and Rampart Reservoir area north of Highway 24 from Waldo Canyon north to Woodland Park (Pikes Peak Ranger District),
The South Platte River in Elevenmile Canyon (South Park Ranger District),
The Jefferson Lake Recreation Area (South Park Ranger District)
The area west and southwest of Colorado Springs along the Old Stage Road and Gold Camp Road (Pikes Peak Ranger District),
All of Rampart Range area on South Platte Ranger District,
The area of the Monument Fire Center - east of summit of Mt. Herman to forest boundary, (Pikes Peak Ranger District),
The South Platte River from Deckers downstream to Chatfield State Park (South Platte Ranger District),
The North Fork of the South Platte River from Buffalo Creek downstream to Chatfield State Park (South Platte Ranger District),
The Sugar Creek road from Sprucewood to the South Platte River (South Platte Ranger District),
The AG Ranch in Shawnee, both sides of Highway 285 (South Platte Ranger District).
Be Good To The Environment:
While it's legal to target shoot in most areas of the forest, we do have concerns about safety, litter and the environment. Please consider using the recently developed non-toxic, biodegradable clay pigeons. They decompose on contact with water (i.e. rain and snow) and are produced by several manufactures. Also, consider using fiber wad shot shells - the plastic wad cups do not degrade. Please pick up any other litter including spent hulls and take them home with you. If you are using lead shot, do not shoot over water bodies, wetlands or other areas used by waterfowl since wildlife may consume the lead and be poisoned by it.
Many areas in close proximity to the Front Range have visible signs of abuse from shooting, such as trees that have been shot down. Leaving litter and damaging vegetation are violations of other federal regulations. Some of these close-in areas have much unsafe, indiscriminate shooting, as well as much intermingled private land and houses. You may want to steer clear of them as well as shooting in the vicinity of cattle on the grazing allotments. Be sure to close any gates that you open.
Consider Quality Out-Of-The-Way Sites:
For a better family experience you may find it necessary to plan ahead and travel farther to areas of the National Forest and National Grasslands where you can be more assured of a safe site and less likely to disturb others. The Comanche National Grassland is one such area (south of Rocky Ford and LaJunta) where visitors are few and your shooting experience can be a safe one. The openness of the grasslands allows shooters to see for a vast distance and use low hills as a backstop. Many of the homes and ranches on the grasslands are few and far between. Also consider similarly open areas on the west side of the South Park Ranger District such as south and north of Trout Creek Pass (US 285), portions of the Salida Ranger District or a trip into the San Luis Valley, for example.
There is also the alternative of using an indoor or outdoor commercial trap and skeet range. These are fairly numerous and available, especially if you don't have the time or inclination to drive to a remote location.
Above all, enjoy and be safe during your recreational shooting visit to your national forests and grasslands
Source:
http://www.fs.fed.us/r2/psicc/recreation/hunting/
Same rules apply for paintball according to the Rangers I've talked to.
Oh, and the areas North and South of Trout Creek Pass noted above are LOVELY and only about 90 min drive from Denver through some lovely scenery. If you're REAL good, I'll give you directions to some prime camping spots for next summer.
Heck, what do you want wanna them pea-shooters for? Get yurself a REAL GUN! I recomend an FAL, but a lever action 30-30 will do in a pinch.
Yes, aside from Denver and to a lesser degree Boulder, AR's are fine.