We stopped at Gregory Bald one more time and watched park workers clearing vegetation between azalea bushes. Russell Field was closed so we had to make it to Spence Field: 20 km,  800 m total altitude gain. Russell had the highest concentration of black flies which swarm all shelters and camp sites during the day. A solo thru-hiker was happy to see us arrive at Spence, still quite shaken by very close encounter with a bear. We had the shelter for ourselves (thru-hikers go to sleep before dark and move-on at dawn). Spent the evening at camp fire and watching synchronous fireflies after dark. We slept late next day. Spence Field to Derrick Knob was supposed to be an easy day, 10 km and 600 m total altitude gain, but it was up-and-down all the time on rugged leg-tiring trail. But first, we climbed Thunderhead Mountain elevation 5527 ft  (1685 masl), highest point of our hike. Clingmans Dome, the highest peak in Smokys, 12 km from Derrick Knob, is 6644 ft (2025 masl). Rocky Top on the slopes of Thunderhead has 360° view of the Smokys.
Smokys from Rocky Top
Derrick Knob was packed. We were asleep when rangers came to close the shelter: returning bear got too bold and stuck its head into somebody’s tent knocking it down (nobody was hurt). They stapled the notice in the morning. We had good, informative discussion with them at breakfast.
