After months -- perhaps years -- of speculation about his plans, U.S. Rep. Jay Inslee will announce Monday his run to replace outgoing Gov. Chris Gregoire.
Inslee's camp said he will make stops at Targeted Growth Inc. in Seattle and Sunnyside Dam Park in Wapato, where he will officially launch his 2012 campaign.
He will go on to whistle stops in Tacoma, Vancouver and Spokane on Tuesday.
"While considering this race, I have been humbled by the encouragement I've received from supporters like you from Port Angeles to Pullman," Inslee wrote on his Facebook page on Friday. "I'm excited to embark on this journey with you as we strive together to build a Washington that works today and into the future."
His campaign said he would not give interviews until after the Monday announcement.
Inslee, 60, once represented the Tri-Cities in Congress before losing the job to Doc Hastings of Pasco in the Republican wave of 1994.
Inslee also served two terms in the state house of Representatives, representing the Yakima Valley in the late 1980s and early 1990s while living in Selah.
Inslee, a Democrat, now lives on Bainbridge Island and ran unsuccessfully for governor in 1996 before being elected to represent Washington's 1st Congressional District in 1998 -- a job he has since held. The district represents several northern Seattle suburbs and surrounding areas.
He is married with three adult children and one grandchild, according to his congressional biography.
Although the official announcement won't come until Monday, Inslee's campaign website already is live at jayinslee.com.
Inslee is not yet listed as a candidate on the Public Disclosure Commission's website, where candidates must report campaign donations and expenditures.
Washington Attorney General Rob McKenna, a Republican, announced his bid for the Governor's Mansion earlier this month.
The state's current "Top Two" primary system will send the top two vote-getters in the August 2012 primary, regardless of party affiliation, on to the general election that November. A new governor will take the oath of office in January 2013.
Republicans already were on the offensive as news of Inslee's run leaked earlier this week.
"Jay Inslee failed the last time he ran for governor and he's failed to bring meaningful reform to Washington, D.C. as a congressman," Republican Governors Association spokesman Mike Schrimpf said in a written statement Thursday. "Voters won't trust him to hold state government accountable and fix the broken system in Olympia."