Volunteers took to 1,750 spots the organizers had marked as needing a clean-up, and many donned boot and glove to remove rubbish from unofficial spots near their homes as well.
The greatest activity was reported in the vicinity of Rīga and in the Vidzeme region, with Latgale following closely.
Latvia's President Raimonds Vējonis (Greens) participated in the event, too, saying his thanks to everyone who took part.
"Thank you for joining us in making our land greener and cleaner," tweeted Vējonis.
Paldies, ka kopīgiem spēkiem padarām savu zemi zaļāku un tīrāku #LielaTalka
— Raimonds Vējonis (@Vejonis) April 23, 2016