Sierra Club co-founder

The answer

MUIR

4 letters. See every clue for this answer on the MUIR answer page.

Used 7 times across 5 distinct years; most recently in 2013; first recorded in 2003. It appears in 5 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.

Other clues for MUIR

Every other clue in this collection answered by MUIR, most used first.

• Naturalist John - used 56 times, most recently in 2026
• "The Ghost and Mrs. ___" - used 53 times, most recently in 2016
• Sierra Club founder John - used 30 times, most recently in 2025
• Sierra Club founder - used 26 times, most recently in 2024
• Sierra Club cofounder - used 20 times, most recently in 2026
• Glacier in Alaska. - used 13 times, most recently in 1979
• American naturalist - used 10 times, most recently in 2008
• Alaskan glacier. - used 9 times, most recently in 1983
• California's ___ Woods - used 9 times, most recently in 2020
• "ABC World News Tonight" anchor David - used 8 times, most recently in 2025
• Conservationist John - used 7 times, most recently in 2016
• John of the Sierra Club - used 6 times, most recently in 2026

Related clues

Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.

• Golf club - IRON, used 80 times
• Kind of club - GLEE, used 77 times
• ___ Club - SAMS, used 42 times
• Spiked club - MACE, used 42 times
• University founder Cornell - EZRA, used 35 times
• Jared of "Dallas Buyers Club" - LETO, used 34 times

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