• Sunset at Lake Mead's Boulder Basin

    Lake Mead

    National Recreation Area AZ,NV

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  • Important Notice to Mariners

    Lake Mead water elevations will be declining throughout the summer. Before launching, check lake levels, launch ramp conditions, changes to Aids to Navigation and weather conditions by clicking on More »

  • Summer Fire Rules in Effect

    Lake Mead NRA is now enforcing summer fire restrictions. Please click 'more' to learn about the rules for fire during our hot, dry season. More »

Notice to Mariners - Changes in the Boulder Basin

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Date: January 5, 2006
Contact: Roxanne Dey, (702) 293-8947

Lake Mead National Recreation Area Superintendent William K. Dickinson announced the following changes in Aids to Navigation in the Boulder Basin on Lake Mead. Due to fluctuating water levels, the Castle Reef Light #4 has been established at:

36 degrees, 3 minutes, 25 seconds north
114 degrees, 43 minutes, 53 seconds west

This aid will show a “Flash” sequence. This light is on for 0.4 seconds and off for 3.6 seconds. The sequence is then repeated.

Lake Mead National Recreation Area is a unit of the National Park Service.

Did You Know?

Golden Strike Canyon in the Black Canyon Wilderness

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