It was a nice morning here, so I went out to work on pruning fruit trees and some garden things. I heard some motorcycles across the valley, mostly because it is flooded and reflects sound well. I thought at first they were the usual ninja bikers doing 130 mph on the back roads, but within a minute my idea changed. Not the screaming donor cycles, but a more subdued and smooth sound. They moved across the bottom of the ridge on the road, I estimated there to 3 to 6 bikes. They then moved out and came my way. I went out to get a view of the main highway and counted 13 of these touring road bikes. Moving right along 80 to 90 mph. They went in town and picked up some dude on a Harley, came back out the highway and off to take a run around the lake. Riding around the lake up about 300 feet in elevation with a 1,000 foot ridge between us, I was still able to hear them clearly, and the Harley especially. Without the Harley, they would have been noticeably quieter. I thought there were 3 to 6 bike and there were 13. Even though they make some noise, you simply cannot estimate how many there is by noise. It seems this might be a good way for a light calvary type unit to move around. Work excellent if you had to move around urban areas. I tried posting a link, but this is problematic sometimes.