No, in general there is really no difference in laws for tourists versus locals for marijuana. Personal use and consumption of marijuana is completely legal. Consumption in public is still technically a petty offense enforced with a small fine. But this is rarely enforced unless there’s a notice or it’s a family place, you’d be bothering people, etc. Use common sense.
There are absolutely no differences in laws applying to the purchase or consumption of weed for either tourists or citizens of Colorado. All of the same regulations still apply. However you can only smoke in designated spaces and on private property. You will have no problems whatsoever purchasing your pot as an out-of-state resident. Best of luck!
Yes, there are different laws for tourists than locals, though, the laws in Colorado make no distinction on locals and tourists in terms of the possession, purchase or consumption of marijuana. There is, however, a distinction on how much marijuana a person can purchase at a time. People with a Colorado ID can purchase up to one ounce of marijuana at a time while tourists can only buy up to one quarter ounce at a time.