Some time before 1800, a large eruption at the 6000' level on Hualalai produced the Ka'upulehu Lava flow. At about the 1000' level, the large a'a flow divided in half. The south fork abuts Kona Village and is presently the scene of development (For all photos, click for larger version):
The north fork of the a'a flow abuts Kiholo Bay. In the middle, the pie-wedge of 2000-year-old pahoehoe is called Kalaemano, or Shark Point. It was the subject of litigation I may have mentioned before.
The 84 mile marker on Queen Kaahumanu was where the road down to the shore at Kalaemano started. It wasn't really a "road", it was just a trail of white paint sprayed or splashed on the lava to mark a navigable path, except for one place where an opening was smashed through a small sharp ridge to enable a 4WD vehicle through. Now the road is "officially" blocked by the state DLNR, although the barrier can be easily avoided.
The road is still there, in any case:
15 years ago I used to drive down that road to the shore (about a mile and a half by measurement) , to camp and fish. Ah, well, passage of time and all that.
Speaking of the Ka'upulehu Lava Flow, here's a one minute video of clouds filling the westernmost (and largest) of the craters from which the flow, uh, flowed. Don't expect excitement.
Continuing on with the theme, here's a lava formation and ohia in about the middle of the Ka'upulehu Lava Flow, just above the Scenic Lookout on the Upper Road (Mamalahoa, Hawaii Belt Road):
Looking to the north, at sunset, at about the 2000' level on the Ka'upulehu Lava Flow. Pu'u Wa'a Wa'a and Mauna Kea in the background:
Finally, no post would be complete without a repetitive photo of another Hawaiian plant, this time an a'ali'i, on (again!) the Ka'upulehu Lava Flow, just below the lip of the westernmost crater: