High-Country Health Food and Cafe in Mariposa California

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acorn campground at new melones lake

April 15, 2026 - Sonora, Calif. – The Bureau of Reclamation will adjust operating hours at New Melones Lake beginning May 1, as part of its seasonal transition. As temperatures rise and visitation increases, Reclamation encourages visitors to plan for updated access hours, boating requirements, and available recreation services. 

Boating and Mussel Prevention

Reclamation requires that all boats launching at New Melones Lake participate in a mandatory 30-day quarantine or make a reservation through New Melones Lake Marina to receive a decontamination wash to prevent the introduction of the Golden Mussel, an invasive species found in the Sacramento-San Joaquin Delta.

Summer Boat Launch Hours 

Glory Hole Point

  • 8 a.m. to 4 p.m. - Monday through Thursday 
  • 6:30 a.m. to 8 p.m. - Friday through Sunday and Federal Holidays  

Tuttletown

Glory Hole Recreation Area

Tuttletown Recreation Area

  • Entrance gate open from 4 a.m. to 9 p.m.
  • Camprgrounds CLOSED
  • Day Use Areas open sunrise to sunset

 Natural Bridges and Other Outlying Day Use Areas

  • Open sunrise to sunset
  • Parking is often limited 
  • Follow all posted signage
  • Pack out all waste

 New Melones Lake Administration & Visitor Center

  • The Visitor Center and Museum are closed.
  • The Administration building is typically open from 8 a.m. to 4:30 p.m. Monday through Friday, except federal holidays. 

  • America the Beautiful Interagency passes and New Melones Lake Annual Day Use and Boat Launch passes are available at the Administration building.

    Tip: Prior to arrival, it is recommended to call the office phone number to confirm that day’s operating hours.

For more information about activities, fees, maps, and updates, visit the New Melones website, call 209-459-7290, or email  BOR-NewMelonesRec@usbr.gov.

Source: USBR

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