We have the answer for John who cofounded the Sierra Club crossword clue if you need some assistance in solving the puzzle you’re working on. The combination of mental stimulation, sense of accomplishment, learning, relaxation, and social aspect can make crossword puzzles a fun and rewarding activity for many people.

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John who cofounded the Sierra Club Crossword Clue Answer is…
Answer: MUIR
This clue last appeared in the Newsday Crossword on March 22, 2023. You can also find answers to past Newsday Crosswords.
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You can play the Newsday crossword online.
Clue & Answer Definitions
- SIERRA (noun)
- a Spanish mackerel of western North America
- a range of mountains (usually with jagged peaks and irregular outline)
- JOHN (noun)
- a room or building equipped with one or more toilets
- youngest son of Henry II; King of England from 1199 to 1216; succeeded to the throne on the death of his brother Richard I; lost his French possessions; in 1215 John was compelled by the barons to sign the Magna Carta (1167-1216)
That should be all the information you need to solve for the crossword clue and fill in more of the grid you’re working on! Be sure to check out the Crossword section of our website to find more answers and solutions.