As noted before, this is a gravel parking lot, but there are no other RV Parks within 20 miles of Hillsboro. If you have a reason to stay in Hillsboro, this is your best option. Note: if there are fairground events scheduled needing the RV sites you will not be allowed to stay. Call to check availability before arriving. There is 20amp ONLY available and the elect outlets are pretty well beat up. The electric contacts may not make good contact with your elect cord. Don't try to run your A/C. Water is available at each parking site, but no dump station available. No picnic tables. If there are RV's in the sites next to you, you may not be able to open an awning as well as your slides. I am not trying to be negative, just stating the facts so people know what to expect. We stayed here in an motorhome, and will stay here again as we have family in Hillsboro. We camped here in a Motorhome.
This is basically a flat spot at the fairgrounds on which to park your RV. The sites have 20 amp electrical and water - nothing else. There are no restrooms, showers, dump stations or any other facilities. Some of the sites are shaded by trees. Not withstanding these shortcomings the site is perfect if visiting friends in Hillsboro, Oregon and you need a convenient place to camp. The site is directly across the street from the Hillsboro airport. Not withstanding the location, it was surprisingly quiet. Fair staff is friendly and considerate. I would stay there again if in Hillsboro. On Google Earth you can find the RV park at latitude 45°31'52.35"N and longitude 122°56'58.99"W. We camped here in a Travel Trailer.