On Top Waterhole (aka North Mammoth Reservoir)



Artificially impounded body of water.
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GPS Coordinates

Latitude, Longitude:
43.072919°, -119.1145925°
Elevation Icon


5102 ft. (1555 m.)

Topographic Map

US Topo Map

The USGS (U.S. Geological Survey) publishes a set of the most commonly used topographic maps of the U.S. called US Topo that are separated into rectangular quadrants that are printed at 22.75"x29" or larger. On Top Waterhole is covered by the Twin Buttes, OR US Topo Map quadrant

Free US Topo Map PDF Order Waterproof Printed Topo Map
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Land Icon Land
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Nearby Reservoirs

Nearby Cities

Nearby Points of Interest

East Weed Lake Butte Waterhole Water 1.9 mi
Weed Lake Butte Land 2.1 mi
Prentis Lake Land 3.2 mi
West Weed Lake Butte Waterhole Water 3.6 mi
Haines Lake Land 3.6 mi

Historical Weather

Below are weather averages from 1971 to 2000 according to data gathered from the nearest official weather station. The nearest weather station for both precipitation and temperature measurements is O O RA which is approximately 18 miles away and has an elevation of 4,136 feet (966 feet lower than On Top Waterhole). Because the nearest station and this geographic feature may have differences in elevation and topography, the historic weather at the two separate locations may be different as well.

Average Daily Temperatures by Month (°F)

Average Monthly Precipitation (in inches)

Month Precip AVG High Temp AVG Low Temp
January .92" 40.2° 18.3°
February .65" 45.4° 23.3°
March 1.07" 52.8° 27.4°
April .84" 60.5° 31.3°
May 1.33" 68.2° 36.7°
June .77" 77.3° 42.8°
July .45" 86.4° 47.8°
August .65" 85.8° 45.3°
September .57" 77.8° 36.9°
October .71" 66.8° 30.2°
November .92" 50.1° 24.2°
December .87" 40.9° 18.3°

Summer High Temps

This location's average summer high temps are lower than 52% of other locations on record.

Winter Low Temps

This location's average winter low temps are lower than 53% of other locations on record.

Precipitation Levels

This location's average precipitation levels are lower than 96% of other locations on record.