The clue "Lunar valley" last appeared in the USA Today crossword on July 10, 2018. The correct answer for this puzzle is "RILL", a 4-letter word.
Solution RILL is our most searched for solution by our visitors. Solution RILL is 4 letters long. We have 0 further solutions of the same word length.
There are 2 solutions. The longest is RILLE with 5 letters, and the shortest is RILL with 4 letters.
Indeed, the puzzle clue "LUNAR VALLEY" has seen a surge in lookups recently (last checked: 23 Feb 2026). Apparently it´s giving players some headaches!
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Solutions are between 4 and 5 letters long.