Last USA spot on 10m?

WG2Z (5600km) was spotting me at 1736z.   I am wondering if this will be the last 10m North American spot, or if the band will remain open longer.

When I go QRT on 10m later this evening I shall leave MF still running.

UPDATE 1935z:   Well WG2Z was the last spot but at 1840z, almost an hour after the above spot.