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Osborne Wash is a stream located in La Paz County, Arizona, United States. It is also intersecting with San Bernardino County, California. It is most popular for fishing Smallmouth bass, Common carp, and Bluegill.
Disclaimer: Always check local fishing regulations, water access rights and land ownership before fishing, regardless of any catches logged in that area by the Fishbrain community. Fishbrain has mapped millions of acres of government-owned land across the USA to help you identify potential fishing access, but you are responsible for ensuring compliance with all legal requirements.
Fishing regulations in Arizona can change throughout the year. Make sure to check this page before fishing for the most up to date rules and regulations for the current season. Local regulations govern when you can fish, the max size of the fish you can keep, how many fish you can keep, and more.
Below you will see fishing regulations for catching Smallmouth bass as of April 1st, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.
Seasons
Bag limit
Special gear
Aggregate
No size limit.
These regulations apply statewide unless Site-Specific Special Regulations apply to that body of water. Click here to see Site-Specific Special Regulations Statewide includes all state and federal refuges, parks and monuments; open areas do not include any area closed to hunting, fishing, or trapping.
CATCH AND RELEASE ONLY:
CATCH AND RELEASE artificial flies and lures only:
UNLIMITED — NO LIMIT FOR EITHER LARGEMOUTH OR SMALLMOUTH BASS:
1 BASS LIMIT, MINIMUM SIZE = 13-INCHES:
1 BASS LIMIT: (no size limit):
2 BASS LIMIT:
2 BASS LIMIT, MINIMUM SIZE = 13-INCHES:
6 BASS LIMIT, MINIMUM SIZE = 13-INCHES:
20 SMALLMOUTH BASS, 5 LARGEMOUTH BASS LIMIT:
Micropterus dolomieui
2 ratings
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