Pingree Road station

The Col. Gustavus A. Palmer House is a historic residence in Crystal Lake, Illinois.

Crystal Lake is one of two stations on Metra's Union Pacific Northwest Line located in Crystal Lake, Illinois. The station is two stops away from the line's terminus at Harvard, and most of the trains on the Northwest Line only run as far as Crystal Lake. A large coach yard is adjacent to the station and has additional storage tracks to store Metra trains overnight, and on holidays and weekends. A Union Pacific maintenance facility and office, some storage tracks for local freight trains and maintenance of way equipment as well as a junction are also located just southeast of here. The branch line to McHenry splits off at this junction. The station is 43.3 miles (69.7 km) away from Ogilvie Transportation Center. Parking is available at the station. As of 2018, Crystal Lake is the 36th busiest of the 236 non-downtown stations in the Metra system, with an average of 1,138 weekday boardings.As of May 30, 2023, Crystal Lake is served by 52 trains (27 inbound, 25 outbound) on weekdays, by 30 trains (15 in each direction) on Saturdays, and by 20 trains (nine inbound, all 11 outbound) on Sundays. On weekdays, 13 inbound trains originate from Crystal Lake and 12 trains terminate here, with five inbound trains originating and five outbound trains terminating here on Saturdays, and two inbound trains originating and three outbound trains terminating here on Sundays.

Crystal Lake Central High School, often referred to as "Central" or "CLC," is the oldest of the three high schools in Crystal Lake, Illinois, United States.

Faith Lutheran High School, commonly referred to as Faith or FLHS, was a private high school located in Crystal Lake, Illinois. It was affiliated with the Lutheran Church–Missouri Synod and served students of McHenry County, Illinois. The school opened in 2004 and closed in 2019. The school's colors were black and red and its mascot was the Saints.

Lake in the Hills Airport (FAA LID: 3CK) is a public airport located at 8407 Pyott Road in Lake in the Hills, a village in McHenry County, Illinois, United States. The airport is owned by the Village of Lake in the Hills and is located 38 miles (61 km) northwest of the central business district of Chicago. It is a designated Federal Aviation Administration reliever airport for Chicago's O'Hare International Airport.

Crystal Lake is a city in McHenry County in the U.S. state of Illinois. Named after a lake 1.6 miles (2.6 km) southwest of the city's downtown, Crystal Lake is 45 miles northwest of Chicago. The population is 40,269 as of the 2020 Census, a 1.2% decrease from 2010. Crystal Lake is the largest city in McHenry County, part of the Chicago metropolitan area.

Prairie Ridge High School, often referred to as "PR," is the newest public high school in Community High School District 155 in Crystal Lake, Illinois, United States. The other three high school in the area include Crystal Lake Central, Crystal Lake South, and Cary-Grove. Prairie Ridge High school opened in 1997 to address the overpopulation of the three area high schools. In addition to Crystal Lake's areas with the 60012 zip code, Prairie Ridge also accepts students from the Northern and Eastern areas of Crystal Lake with the 60014 zipcode, along with Prairie Grove, Oakwood Hills, Burtons Bridge, Ridgefield, and small portions of McHenry, Cary, and Bull Valley. Prior to opening its doors, the first graduating class of students was allowed to vote on the name, colors, and song for the new high school. The district approved the name, and Prairie Ridge was born. As of the 2017–2018 school year, Prairie Ridge is the smallest high school in District 155.

Lake Killarney is a subdivision surrounding a private lake located to the west of the Fox River in unincorporated Cary and Crystal Lake, Illinois. It is located 45 miles (72 km) northwest of Chicago. Lake Killarney residents have exclusive lake rights to an 80-acre (320,000 m2) spring fed lake. The Lake Killarney Home Owners Association was incorporated March 15, 1962, and is the sole owner of the "Common Properties" known as Lake Killarney (the lake itself), its two beaches, parkland areas, along with various sections of property surrounding the lake.

Algonquin Township is located in McHenry County, Illinois, with the township office in the city of Crystal Lake. As of the 2020 census, its population was 87,633 and it contained 33,960 housing units. It is the largest township by population in McHenry County. Communities located within the township include Algonquin, Barrington Hills, Cary, Crystal Lake, Fox River Grove, Lake in the Hills, Port Barrington, Lakewood, Oakwood Hills, and Trout Valley.

Terra Cotta is an unincorporated community in McHenry County, in the U.S. state of Illinois.

Crystal Lake South High School, often referred to as "South" or "CLS," is one of three high schools in Crystal Lake, Illinois, and currently has a body of roughly 1916 students. As Crystal Lake's second oldest school, it was constructed from 1976 to 1978 and opened in September 1978 after Crystal Lake Community High School, now Crystal Lake Central High School, split into two schools due to the pressures of the population growth in the communities it served, Crystal Lake, a part of Lake in the Hills and a small portion of Algonquin. South graduated its first class in 1979 - this class consisted of approximately 250 seniors who were transferred from Crystal Lake Central High School. South graduated its first class who attended all four years in 1982. After the community's school split, the South Gators and Central Tigers became rivals in the Fox Valley Conference. Though recently, focus of rivalry has primarily shifted to the Cary-Grove High School Trojans and the Prairie Ridge Wolves due to vastly increased competition in football games between the two schools. However, an underlying tone of competition still vibrates between the two Crystal Lake schools. The city of Crystal Lake has grown rapidly since South first opened it doors. The school reached its structural capacity in 2002. A new addition opened for the 2003-2004 school year, with several dozen new classrooms. However, due to the phenomenal growth of the city, the addition was already insufficient by the 2005-2006 school year (the graduating class of 2004 consisted of 366 students, class of 2006 had 435 students, and the class of 2009 contained approximately 540 students). The final phase of the 2003-2004 additions was opened in the 2006-2007 school year. The "Lower level" under C-Hall added 10 classrooms and over 100 lockers. In 2018, the Lower Level was renovated and reopened as a separate school, due to shrinking population in Crystal Lake.Crystal Lake South High School's mascot is the "Gator". This mascot was chosen in 1976 by a poll of students who would attend South when it first opened. South was sued by the University of Florida (CLS allegedly used their logo without permission to sell it on merchandise) and the logo was changed. From this, arose a contest; graduates, current students, and the community got to design and enter logo's to be voted upon for the new one. The new logo was chosen and was used in place of the old one beginning in the 2011-2012 school year. During the summer of 2016, the entrance to the school was rebuilt, and a bronze gator statue was placed outside of the school. In 2017, the baseball team won the IHSA Class 4A baseball state championship.

Prairie Grove is a village in McHenry County, Illinois, United States, first incorporated in 1973. Per the 2020 census, the population was 1,963.