How old do i need to be in order to stay at a hotel by my self?

I am 18 and planning on going to Colorado. I have went to many sites to get a ticket and hotel and most websites say i need to be 21 but some don't what age do i need to be?

At 18, Colorado considers you an adult. The actual governing Colorado law relating to minors is as follows:

"12-44-302. Innkeepers' right to refuse accommodations - exceptions.

(1) An innkeeper has the right to refuse or deny accommodations,

facilities, and the privileges of a lodging establishment to any

person who is not willing or able to pay for such accommodations,

facilities, and services. The innkeeper shall have the right to

require a prospective guest to demonstrate his or her ability to pay

by cash, valid credit card, or a validated check, and if the

prospective guest is a minor, the innkeeper may require a parent or

legal guardian of such minor or other responsible adult:

(a) To provide a valid credit card number or agree, in writing, to pay

for the cost of:

(I) The guest room, including applicable taxes;

(II) All charges made by the minor; and

(III) Any damages caused by the minor or the minor's guests to the

guest room or its furnishings; or

(b) To provide an advance cash payment to cover the cost of the guest

room for all nights reserved, including applicable taxes, plus a cash

deposit to be held toward the payment of any charges made by the minor

and any damages to the guest room or its furnishings. The cash deposit

shall be refunded, unless applied to charges or damages, following a

joint inspection of the room. It is the obligation of the guest to

join the innkeeper during the inspection. Should the guest fail to

join the innkeeper, the guest thereby waives his or her right to the

joint inspection. Such refund, if any, shall immediately be made to

the extent it is not used to cover the described charges or damages.

usually it is 18, but you'll need a credit card to guarantee a reservation. when you check in, they'll ask for your credit card to guarantee any incidental charges that you may bill to your room. if you don't have a credit card, you can leave a cash deposit or the hotel will close your room to any charges.

Depend's on the hotel and the rules they have. Some say you have to be 21 for insurance reasons and some say 18. Keep searching and you'll find what you need.