A poem about stargazing and mountain climbing? Check and check.

Mountain Day
by W. S. Merwin

With one dear friend we go up the highest mountain
thousands of feet into the birdless snow
and listen to our breaths in the still air
for a long time beside the observatories
later we stretch out on the dark crumbled
lava slope looking
west at the sun yellowing the clouds below
then go down past the wild cows to the cabin
getting there just before sunset
and eat by the fire laughing at what we have
forgotten to bring
afterward we come out and lie
braided together looking up
at Cassiopeia over the foothill.