Heart's last local performance date, according to the provided reference, was August 2016 at the Woodlands Pavilion. However, this information is limited to a specific local event and doesn't clarify when they last toured comprehensively.
To answer the question more broadly, we need to consider a "tour" as a series of connected concerts. As of late 2023/early 2024, Heart has announced plans for a tour in 2024. Therefore, the most recent tour before the upcoming 2024 events would be the closest answer available at this time based on general knowledge.
Therefore, without more definitive information about a complete, formally named "tour," it's difficult to state precisely when Heart last toured in a comprehensive way. The provided "Aug. 2016" is a performance date, not a tour.
