Dr Liz Grauer, Veterinarian for the Humane Society, recommends:

For a safe dog park visit, your dog must be current on the following vaccinations...

If your puppy is between 4 mos - 1 yr:

• Distemper-parvo vaccine within past 6 months
  (dogs under 4 mos of age should NOT be at the park)

Over 1 yr:

• Distemper-parvo vaccine every 3 years thereafter
  (if your pooch has been properly & completely vaccinated as a pup )
• Kennel Cough Intranasal Vaccine every 6 months
• Current Rabies vaccine (required by the county)
• Leptospirosis Vaccine**

**note about leptospirosis: This is an uncommon disease and a lot of the Distemper Parvo vaccines are leaving it out because it causes the most bad vaccine reactions, but it is a water-borne nasty infection. If your dog hasn't previously reacted to it, Dr Grauer recommends it, as we're seeing it pop up more in the NW. Drinking out of mud puddles that an infected animal has urinated near is a prime way dogs catch the infection.