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Arroyo Bayo facts for kids

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Arroyo Bayo
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Location of the mouth in California
Other name(s) Arroyo Bayou
Country United States
State California
Region Santa Clara County
Physical characteristics
Main source Just west of upper San Antonio Valley in the Diablo Range
2,420 ft (740 m)
37°20′06″N 121°29′20″W / 37.33500°N 121.48889°W / 37.33500; -121.48889
River mouth Confluence with San Antonio Creek to form Arroyo Valle
1,808 ft (551 m)
37°23′08″N 121°34′21″W / 37.38556°N 121.57250°W / 37.38556; -121.57250
Basin features
  • Left:
    Jack Canyon Creek, Blumbago Canyon Creek
  • Right:
    Bollinger Canyon Creek, Sawtooth Canyon Creek

Arroyo Bayo is an 8-mile-long (13 km) perennial stream which flows northwestly along Mount Hamilton Road east of Mt. Hamilton in the Diablo Range. It is part of the southern Alameda Creek watershed in Santa Clara County, California.


The historic Rancho Arroyo Bayo was located where Blumbago Canyon Creek joins Arroyo Bayo. The section of Mt. Hamilton Road east of Mt. Hamilton was known as Bayou Road on the historic Thomas and West map. "Bayo" is Mexican Spanish for a dun, brown, or sorrel horse with a dark mane, tail and stripe on its back.

Watershed and course

Arroyo Bayo arises at 2,240 feet (680 m) then flows west-northwest along Mount Hamilton Road then turns north where it is joined by San Antonio Creek to form Arroyo Valle. Arroyo Valle flows north through Lake Del Valle to the Livermore Valley where it turns west to Arroyo de la Laguna at Interstate 680, ultimately joining Alameda Creek and ultimately terminating in San Francisco Bay.

Habitat and Ecology

Informal surveys of Arroyo Bayo have found no steelhead trout (Oncorhynchus mykiss).

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