Last season’s “American Idol” runner-up Adam Lambert is extending the reach of his long-awaited Glam Nation Tour with a total of 40 concert dates...

Last season’s “American Idol” runner-up Adam Lambert is extending the reach of his long-awaited Glam Nation Tour with a total of 40 concert dates now on his summer schedule.

While the tour doesn’t officially begin until the first week of June, Lambert’s itinerary opens this weekend with a set at the radio-sponsored Wango Tango concert on May 15 in Los Angeles, CA. His routing for the season will keep him on the road through a September 18 show at Tropicana Field in St. Petersburg, FL.

When initial plans for the Glam Nation Tour were revealed, Lambert had just over a dozen concerts confirmed. Now his trek includes gigs on June 15 at Riverside Theatre in Milwaukee, WI; July 3 at the House of Blues in North Myrtle Beach, SC; July 17 at Paramount Theatre in Denver, CO;and August 19 at Cape Cod Melody Tent in Hyannis, MA.

Stops in two previously announced tour markets have also been extended to two-night stands. Lambert will perform to sold-out audiences on June 22-23 at Nokia Theatre Times Square in New York, NY, followed the next month by July 27-28 concerts at the OC Fair in Costa Mesa, CA.

Ticket sales have already started in select tour markets; the next round of onsales begins May 14 in other markets. Most ticket face values are below the $50 mark, according to current listings on Ticketmaster.com.

Select dates of the tour will feature support from guitarist Orianthi and Lambert’s former “Idol” competitor Allison Iraheta.

“I hope the audience will be able to escape for a few hours and fall into a world full of glam, drama and excitement,” Lambert said in a statement on his official Web site. “And I would love everyone to come away with a new appreciation for the music on my album.”

Lambert is touring behind his debut album, “For Your Entertainment,” released in November 2009. Since the record opened at No. 3 on the Billboard 200, it has sold more than 615,000 copies, according to an end-of-April report from USA Today.

Adam Lambert itinerary:
(Dates are subject to change.)

May 15Los Angeles, CAKIIS FM Wango Tango
May 22Mansfield, MAKISS 108 FM Concert
June 4Wilkes-Barre, PA Kirby Center for Performing Arts
June 5Sayreville, NJStarland Ballroom
June 6Fishkill, NYDutchess Stadium
June 8Toledo, OHThe Omni
June 10Council Bluffs, IAStir Concert Cove
June 11Mahnomen, MNShooting Star Casino
June 12Prior Lake, MNMystic Lake Casino
June 14Columbus, OHLifestyle Communities Pavilion
June 15Milwaukee, WIRiverside Theatre
June 17Hammond, INThe Venue at Horseshoe Casino
June 18Royal Oak, MIRoyal Oak Music Theatre
June 19Toronto, ONKISS 92.5 Wham Bam
June 22 – 23New York, NYNokia Theatre Times Square
June 24Mashantucket, CTMGM Grand at Foxwoods
June 26Atlantic City, NJBorgata Event Center
June 27Baltimore, MDRams Head Live!
June 28Washington, DC9:30 Club
June 30Norfolk, VANorVa
July 2Charlotte, NCFillmore Charlotte
July 3North Myrtle Beach, SCHouse of Blues
July 6Knoxville, TNTennessee Theatre
July 9Cleveland, OHAllen Theatre
July 10Louisville, KYThe Kentucky Center for the Performing Arts
July 12Chesaning, MIChesaning Showboat Music Festival
July 13Lansing, MICommon Ground Music Festival
July 15Kansas City, MOThe Midland
July 17Denver, COParamount Theatre
July 19Boise, IDMorrison Center for the Performing Arts
July 20Seattle, WAShowbox SoDo
July 21Portland, ORMcMenamins Crystal Ballroom
July 23San Francisco, CAWarfield Theatre
July 27 – 28Costa Mesa, CAOC Fair
July 31Las Vegas, NVMandalay Bay Beach
August 13Bethlehem, PABethlehem Musikfest
August 19Hyannis, MACape Cod Melody Tent
August 20Cohasset, MASouth Shore Music Circus
September 4Rockford, ILOn the Waterfront Festival
September 18St. Petersburg, FLTropicana Field