Way down at the end of the aisle under "Y" I find a slew of Neil Young albums, including Everybody Knows This is Nowhere, his first release with Crazy Horse. There are three well-known songs from this album: "Cinnamon Girl," "Cowgirl in the Sand," and "Down by the River." The first one is short enough to get airtime on radio, the latter two are not. Both "Cowgirl" and "River" have extended guitar jams taking them above the 7-minute mark.
Here is CSNY singing "Down by the River," from a television performance in 1969. To quote Dylan, "I was so much younger then, I'm older than that now."