Most newspapers have guidelines for what sorts of letters to the editor they will publish. Some require a typed letter, but many now prefer that you send it via an e-mail. Other guidelines may appear on the letters to the editor page, or on the newspaper's web site. Speaking of web sites, this is where you can find the appropriate e-mail address for submitting your letter. Don't do it.
Newspapers compete with each other just like any other publication.
They hate to see the same letters turn up in the pages of their cross-town rival newspaper. Sending multiple submissions is fine with a press release, but not with a letter. Pick your target carefully, perhaps the newspaper with the widest circulation in your region, and go after it first. Then, in a few weeks, write another letter that addresses a different issue pertaining to Alaska wild lands, and submit it to another paper. You'll find that your 250-word limit is just about used up.