Big Bog Festival brings community together in Kelliher Spanning three days, the majority of the festival took place on Saturday, July 10, including many children’s games, a car show, a parade and a flea market, among other activities. 7:28 pm, Jul. 12, 2021 × An attendee sits in the dunk tank at the annual Big Bog Festival on Saturday, July 10, 2021, in Kelliher. (Madelyn Haasken / Bemidji Pioneer) KELLIHER, Minn. -- The small community of Kelliher came alive during its annual Big Bog Festival this past weekend, reveling and reuniting in the joys of summer. Spanning three days, the majority of the festival took place on Saturday, July 10, including many children’s games, a car show, a parade and a flea market, among other activities.