I was in Richland for work and stayed at Red Lion hotel, by the river. That was very convenient for running, so I used that opportunity to run three mornings in a row on the Riverfront trail. I was quite amazed at how great the trail was, and surprised to see that there were very few people on it. First two days, I went north from my hotel, staying on the trail all the way to the Ferry rd. where it ends. From there, I went back the same way. Third day, I took the trail south, went under the I-182 bridge and from there followed the trail going west for about a mile. I went the same route on the way back.
All in all, this is a great place to run. Very scenic, beautiful sunrises, clean air.