Boat registration certificates are valid for three years and expire on the April 30th of the last calendar year of the registration period.

Renewal notices for boats are normally sent out as a reminder to those customers who have registered in Grundy County.

Snowmobiles and ATV's expire on December 31st of every year.  In order to renew a snowmobile or ATV registration, you will need the following information:

• Registered owner's name, date of birth and social security number or Driver's License or DNR PIN number.
• Vehicle Identification Number (VIN) for each snowmobile or ATV you wish to register. 

If you have specific questions, you may contact our office, our local DNR officer or visit the Iowa Department of Natural Resources website at http://www.iowadnr.com.