After a quiet, full night of sleep in the well-maintained campground of Umpqua, I start the vehicle and continue driving north on Highway 101. I set out heading north and left the sand dunes area of the Oregon coast. It was very early in the morning, so all the places for renting ATVs or Polaris RZRs were closed. I have done a sand dune drive here in the past, but it's a shame I didn't get to do it this time around, another thing for next time. The Sea Lion Caves and Heceta Head Lighthouse Sea Lion Caves: Hearing the power of nature deep underground.