Alamo, California

The Eugene O'Neill National Historic Site, located in Danville, California, preserves Tao House, the Monterey Colonial hillside home of America's only Nobel Prize-winning playwright, Eugene O'Neill.

The Tassajara Formation is a geologic unit within the Livermore Valley of Northern California, United States. The formation surfaces only in the northern upland parts of the Livermore Valley and underlie the central part of the valley floor at a depth ranging from 250 feet (80 m) to 700 feet (200 m). The Tassajara Formation consists of sediments ranging from brown to gray mudstone, andesitic sandstone, conglomerate, and minor bentonitic and pumiceous tuff. In the northern San Ramon area, the Tassajara Formation underlies Quaternary valley fill material. The Bishop Subbasin is an aquifer that resides between two subsurface ridge formations of the Tassajara Formation in the northern extremity of the Amador Valley.

Castle Hill is a census-designated place in Contra Costa County, California. Castle Hill sits at an elevation of 302 feet (92 m). The 2010 United States census reported Castle Hill's population was 1,299.

Las Trampas Regional Wilderness is a 5,342-acre (21.62 km2) regional park located in Alameda and Contra Costa counties in Northern California. The nearest city is Danville, California. Las Trampas is Spanish for the traps, or the snares. The park belongs to the East Bay Regional Park District (EBRPD).

San Ramon Valley High School is a four-year public high school located in the East Bay neighborhood of Danville, California, United States. It is a part of the San Ramon Valley Unified School District. It is a National Blue Ribbon school from the Blue Ribbon Schools Program as well as a California Distinguished School. Its rival is Monte Vista High School.

Las Trampas Peak is a 1,827 ft (557 m) peak in the Inner Coast Ranges in western Contra Costa County, California, in the San Francisco Bay Area.

Las Trampas Ridge is an 1,827 ft (557 m) ridge in western Contra Costa County, California, in the San Francisco Bay Area. It comprises the western side of the San Ramon Valley.

The Iron Horse Regional Trail is a rail trail for pedestrians, horse riders and bicycles in the East Bay Area in California. This trail is located in inland central Alameda and Contra Costa counties, mostly following a Southern Pacific Railroad right of way established in 1891 and abandoned in 1977. The two counties purchased the right of way at that time, intending to use it as a transportation corridor; the Iron Horse Trail was first established in 1986. In 2003, BART proposed to also use the right-of-way for a DMU line from Walnut Creek station to Tracy via Pleasanton.The trail passes through the cities of Pleasanton, Dublin, San Ramon, Danville, Alamo, Walnut Creek, Pleasant Hill and Concord. When completed, the trail will span from Livermore in central Alameda County to Suisun Bay at the northern edge of Contra Costa County, a distance of over 40 miles (64 km) connecting two counties and nine communities. The trail also directly connects to both the Dublin/Pleasanton and Pleasant Hill BART stations. The trail is maintained by the East Bay Regional Park District. It is a wheelchair accessible paved trail along with adjacent unpaved or soft trails in certain areas.The Iron Horse Regional Trail has several bridges over busy thoroughfares to help improve traffic flow; two notable ones cross over Ygnacio Valley Road in Walnut Creek and Treat Boulevard in Contra Costa Centre. Additional bridges are in the planning process. Despite initial skepticism, and even opposition, the trail is now a major transportation and recreation corridor. One million trips are made each year on the path.

San Miguel is a census-designated place in Contra Costa County, California. San Miguel sits at an elevation of 249 feet (76 m). The 2010 United States census reported San Miguel's population was 3,392.

Rancho San Ramon (St. Raymond Ranch in Spanish) was a 8,917-acre (36.09 km2) Mexican land grant in the northern San Ramon Valley of present-day Contra Costa County, California. Rancho San Ramon (Amador) was adjacent in the southern San Ramon Valley. It was given in 1833 by Governor Jose Figueroa to Mariano Castro and Bartolome Pacheco. Governor Figueroa granted Castro and Pacheco two square leagues of San Ramon Valley from the crest of the western ridge to the crest of the east. Castro had the northern square league, and Pacheco the southern.The grant included present-day Alamo, Danville and northern San Ramon.

Little Hills Picnic Ranch, sometimes called the "Ranch at Little Hills" or just "Little Hills" is a park in Contra Costa County, California near San Ramon. It is located at 18013 Bollinger Canyon Road and is adjacent to Las Trampas Regional Wilderness. Managed by the East Bay Regional Parks District (EBRPD), it is classed as a "picnic park," accessible only by reservation. There are no facilities for camping.

The Town of Danville is located in the San Ramon Valley in Contra Costa County, California. It is one of the incorporated municipalities in California that use "town" in their names instead of "city". The population was 43,582 at the 2020 census. Since 2018, for five years in a row, Danville was named "the safest town in California".The Iron Horse Regional Trail runs through Danville. It was first a railroad that has been converted to an 80-foot (24 m) wide corridor of bike and hike trails as well as controlled intersections. Extending from Livermore to Concord, the trail passes through Danville.Danville is also home to the Eugene O'Neill National Historic Site, Village Theatre and Art Gallery, and the Museum of the San Ramon Valley.