In Weed California during the spring summer and autumn this ceremony is held on most Saturdays in Stewart Mineral Springs. It is best to call the office in advance. I am not sure how the “link” thing works, but the name of the website appears to be “Spirit of the Wind”. A man by the name of Walking Eagle performs the ceremony.
Good luck! http://www.starhawk.com/spirit/information.html is the web addy
Sweat lodge is not something one just shows up to uninvited. Since many lodges are located on privately owned land you’d have to be invited by the person who runs the lodge or by a person who already attends. Despite your claim of American Indian ancestry, you may not be accepted as many who run lodge will only sweat with ndns. However there are others who will accept you in. Do not be offended if you are not allowed in, the leader is only protecting the sanctity of his lodge. Some charge $$ for lodge. If you want to pay, go ahead, the persons who takes your money will laugh all the way to the bank.
There is a lot of controversy over non-natives and sweatlodge both as participants and (laughably) as leaders. Good luck. I hope you find what you’re looking for but know that your exploration treads on the rights and traditions of others…