
In February 2018, thirty shows were announced to take place across the United States and Canada, beginning in June 2018. Initial dates for the tour sold out, prompting Live Nation to extend the tour with additional dates. Pre-sale tickets for the tour were offered to the band's fan club members on October 11, 2017, before going on sale to the general public on October 13. Initially, twenty-nine shows were scheduled in Europe beginning in March 2018. Walk the Moon, K.Flay, MisterWives, Joywave, and Welshly Arms were confirmed as the supporting acts on select dates. In addition, it was announced that the band's fifth studio album America will be released on April 6, 2018. Frontman Jared Leto made the announcement on The Ellen DeGeneres Show, giving members of the audience a ticket to an upcoming show. On February 8, 2018, tour dates were revealed for North America in two legs. The announcement came after the band concluded a promotional tour with Muse and PVRIS, which was one of the highest-grossing North American tour of 2017, according to Pollstar's annual year end tour chart.

The band debuted live the song at the 2017 MTV Video Music Awards, during a performance which was described as groundbreaking since it became the first live broadcasting shown through innovative infrared technology. Thirty Seconds to Mars officially announced the tour on October 6, 2017, shortly after releasing the song " Walk on Water" as the lead single from their fifth studio album. Due to the large demand and tickets selling out in minutes in multiple locations, extra tour dates were added to the itinerary. The tour was promoted by Live Nation and sponsored in-part by AT&T. The support acts for the tour included Walk the Moon, K.Flay, MisterWives, Joywave, and Welshly Arms. It began on Main Basel, Switzerland, and concluded on Augin Großpösna, Germany. It was initially announced in October 2017 with European dates being released at the same time, with North American dates announced afterwards.

Staged in support of the band's fifth studio album America (2018), the tour visited arenas and stadiums throughout 20.

The Monolith Tour was a concert tour by American rock band Thirty Seconds to Mars. Thirty Seconds to Mars concert chronology
