Lugalbanda was the second leader of Uruk and most likely son of Enmerkar (Nimrod?), as inscribed on ancient Sumerian clay tablets. Lugalbanda is considered the father of Gilgamesh, who would later rule Uruk. I consider the location of Lugalbanda’s mountain cave important, because it helps to confirm the “seven mountains” route mentioned in Enmerkar and the Lord of Aratta Sumerian text, where Aratta’s location is described as coming from Uruk to Susa, following a river and through seven mountains enroute to Aratta (Godin Tepe?).
Many consider the Sumerian texts like the Epic of Gilgamesh, Enmerkar and the Lord of Aratta, Lugalbanda in the Mountain Cave and others as myths. I think the level and precision of details provided in these ancient texts point to actual people, places and events. For example, read the following excerpt from Lugalbanda in the Mountain Cave:
"Five days passed. On they sixth day they bathed. ...... on the seventh day they entered the mountains."
From the above passage, it took 5-6 days to reach Susa from Uruk. They likely bathed in Susa, then entered the Zagros mountains on day 7. It probably took the army a few days to reach Awan following the Karkheh river until it splits around Pol Dokhtar to become the Kashkan river. Then maybe another few days from Awan to pass through the last three (of seven) mountain gates to reach the cave halfway to Aratta.
"Lugalbanda, the eighth of them, ...... was washed in water. In awed silence he went forward, ...... he marched with the troops. When they had covered half the way, covered half the way, a sickness befell him there, 'head sickness' befell him."
It just so happens that Yafteh Cave located at 33.567028, 48.273917 is approximately halfway between Susa and Godin Tepe (southwest of Alvand mountain), where I believe Aratta was located. Yafteh is a very famous and well-known cave dating back to the Paleolithic period. Some relate the name Yafteh with Japtheh, one of Noah’s sons.
See the map below that shows the location of Yafteh Cave in relation to Susa, Seven Mountains, and Godin Tepe (Aratta?).
Credit Google Maps for background image
My proposed location for the ancient site of Awan would be almost midway through the seven mountains section of the route. Though speculative, Lugalbanda may have stayed in Yafteh Cave on the way to Aratta.
Lugalbanda in the Mountain Cave (full text)