Mon-Maq Dam Access near Monticello offers a modern boat ramp above the dam for fishing and sandy put-in areas downstream for canoeists and kayakers on the Maquoketa River Water Trail. The 9.

5-foot dam built in 1853 (rebuilt 1913-1914) has good warning signs and a portage option on the river-left (east bank), with interpretive signage and a viewing platform available at the old mill site.

Exercise extreme caution near the dam structure itself, and note that anglers are exempt from the posted closing time (10:30 PM - 4:30 AM).