Ya, I've heard HARs maybe 5-10 miles away, 15 miles max on a crazy day. I noticed a significant number of HARs in the state of WA are on 1610 you might just need to find the one that is the closest, It may be from ID unless you heard them say WA. Or the best thing to do is just keep listening for it and get an actual ID. This is the HAR resource I have used for years:
http://www.angelfire.com/sc/scannerpost/tisgov.html