Foothills or piedmont are geographically defined as gradual increases in

elevation The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vert ...

at the base of a

mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have arise ...

, higher

hill A hill is a landform that extends above the surrounding terrain. It often has a distinct Summit (topography), summit. Terminology The distinction between a hill and a mountain is unclear and largely subjective, but a hill is universally con ...

range or an upland area. They are a transition zone between

plain In geography, a plain is a flat expanse of land that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands ...

s and low

relief Relief is a sculptural method in which the sculpted pieces are bonded to a solid background of the same material. The term ''relief'' is from the Latin verb ''relevo'', to raise. To create a sculpture in relief is to give the impression that the ...

hills and the adjacent topographically higher

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and ...

s, hills, and uplands. Frequently foothills consist of

alluvial fan An alluvial fan is an accumulation of sediments that fans outwards from a concentrated source of sediments, such as a narrow canyon emerging from an escarpment. They are characteristic of mountainous terrain in arid to semiarid climates, but a ...

s, coalesced alluvial fans, and

dissected plateau A dissected plateau is a plateau area that has been severely eroded such that the relief is sharp. Such an area may be referred to as mountainous, but dissected plateaus are distinguishable from orogenic mountain belts by the lack of folding, me ...

Description

Foothills primarily border mountains, especially those which are reached through low ridges that increase in size closer and closer to the mountain, but can also border uplands and higher hills.

Examples

Areas where foothills exist, or areas commonly referred to as the foothills, include the: *

Sierra Nevada foothills :''See Sierra Nevada for general information about the mountain range in the United States.'' The ecology of the Sierra Nevada, located in the U.S. states of California and Nevada, is diverse and complex: the plants and animals are a significant ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, USA *

Foothills of the San Gabriel Valley The Foothills of the San Gabriel Valley are the foothills and hills in the San Gabriel Valley of eastern Los Angeles County, California. They include the foothills of the San Gabriel Mountains, and independent low mountain ranges of hills, in the ...

Los Angeles County Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States and in the U.S. state of California, with 9,861,224 residents estimated as of 2022. It is the ...

, USA *

Rocky Mountain Foothills The Rocky Mountain Foothills are an upland area flanking the eastern side of the Rocky Mountains, extending south from the Liard River into Alberta. Bordering the Interior Plains system, they are part of the Rocky Mountain System or Eastern Syst ...

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

and

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

Silesian Foothills Silesian Foothills ( pl, Pogórze Śląskie, cs, Slezské podhůří, szl, Pogōrze Ślōnske) are foothills located in Silesian Voivodeship, Poland. It has an area of 545 km2. Its western border is Olza river, eastern Skawa. Other main ri ...

Silesia Silesia (, also , ) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Republic and Germany. Its area is approximately , and the population is estimated at around 8,000,000. Silesia is split ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

Sivalik Hills The Sivalik Hills, also known as the Shivalik Hills and Churia Hills, are a mountain range of the outer Himalayas that stretches over about from the Indus River eastwards close to the Brahmaputra River, spanning the northern parts of the Indi ...

along the

Himalayas The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...

in the

Indian subcontinent The Indian subcontinent is a list of the physiographic regions of the world, physiographical region in United Nations geoscheme for Asia#Southern Asia, Southern Asia. It is situated on the Indian Plate, projecting southwards into the Indian O ...

Catalina Foothills Catalina Foothills is an unincorporated community and census-designated place (CDP) located north of Tucson in Pima County, Arizona, United States. Situated in the southern foothills of the Santa Catalina Mountains, Catalina Foothills had a po ...

near

Tucson , "(at the) base of the black ill , nicknames = "The Old Pueblo", "Optics Valley", "America's biggest small town" , image_map = , mapsize = 260px , map_caption = Interactive map ...

Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...

, USA * Appalachian foothills in

Western North Carolina Western North Carolina (often abbreviated as WNC) is the region of North Carolina which includes the Appalachian Mountains; it is often known geographically as the state's Mountain Region. It contains the highest mountains in the Eastern United S ...

and Northwestern

South Carolina )''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...

, USA *

Margalla The Margalla Hills () are a hill range within the Margalla Hills National Park on the northern edge of Islamabad Capital Territory, Pakistan, just south of Haripur District, Khyber Pakhtunkhwa. They are part of the Himalayan foothills. The M ...

hills near the Himalayas in

Pakistan Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a population of almost 24 ...

*The Duars, Chos and Terai on the foothills of Himalayas (India) *The foothills around

Boise Boise (, , ) is the capital and most populous city of the U.S. state of Idaho and is the county seat of Ada County. On the Boise River in southwestern Idaho, it is east of the Oregon border and north of the Nevada border. The downtown area's ...

in Idaho, USA *'The foothills' of the

Dandenong Ranges The Dandenong Ranges (commonly just The Dandenongs) are a set of low mountain ranges, rising to 633 metres at Mount Dandenong, approximately east of Melbourne, Victoria, Australia. The ranges consist mostly of rolling hills, steeply weathere ...

Melbourne Melbourne ( ; Boonwurrung/Woiwurrung: ''Narrm'' or ''Naarm'') is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in both Australia and Oceania. Its name generally refers to a met ...

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. Generally the area from

Ferntree Gully Ferntree Gully is a suburb in Melbourne, Victoria (Australia), Victoria, Australia, at the foothills of the Dandenong Ranges, 30 km south-east of Melbourne's Melbourne City Centre, Central Business District, located within the City of Kn ...

Boronia ''Boronia'' is a genus of about 160 species of flowering plants in the citrus family Rutaceae. Most are endemic to Australia with a few species in New Caledonia, which were previously placed in the genus ''Boronella''. They occur in all Austra ...

/ The Basin through to

Belgrave Belgrave may refer to: Places *Belgrave, Cheshire, an English village *Belgrave, Leicester an English district *Belgrave, Victoria, a suburb of Melbourne, Australia ** Belgrave railway line **Belgrave railway station, Melbourne **Belgrave (Puffing ...

. *'The foothills' of the Blue Mountains in

Sydney Sydney ( ) is the capital city of the state of New South Wales, and the most populous city in both Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about towards the Blue Mountain ...

, Australia. *The foothills of the

Southern Alps The Southern Alps (; officially Southern Alps / Kā Tiritiri o te Moana) is a mountain range extending along much of the length of New Zealand's South Island, reaching its greatest elevations near the range's western side. The name "Southern ...

Mid-Canterbury Mid Canterbury (also spelt Mid-Canterbury and mid-Canterbury) is a traditional, semi-official subregion of New Zealand's Canterbury Region extending inland from the Pacific coast to the Southern Alps. It is one of four traditional sub-regions of C ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

. *The

Judean Foothills Judea or Judaea ( or ; from he, יהודה, Standard ''Yəhūda'', Tiberian ''Yehūḏā''; el, Ἰουδαία, ; la, Iūdaea) is an ancient, historic, Biblical Hebrew, contemporaneous Latin, and the modern-day name of the mountainous sou ...

between the

Judean Mountains The Judaean Mountains, or Judaean Hills ( he, הרי יהודה, translit=Harei Yehuda) or the Hebron Mountains ( ar, تلال الخليل, translit=Tilal al-Khalīl, links=, lit=Hebron Mountains), is a mountain range in Palestine and Israel wh ...

and Mediterranean Coastline in

Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...

Synonyms

Another word for a foothill region is "piedmont", derived from "foot of the mount" in

Romance languages The Romance languages, sometimes referred to as Latin languages or Neo-Latin languages, are the various modern languages that evolved from Vulgar Latin. They are the only extant subgroup of the Italic languages in the Indo-European language fam ...

. The

Piedmont it, Piemontese , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , demographics1_title2 ...

region of Italy lies in the foothills of the

Alps The Alps () ; german: Alpen ; it, Alpi ; rm, Alps ; sl, Alpe . are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately across seven Alpine countries (from west to east): France, Sw ...

, and several other foothills in other parts of the world are called "piedmont", and include: *The piedmont of the United States which consists of the eastern foothills of the

Appalachian Mountains The Appalachian Mountains, often called the Appalachians, (french: Appalaches), are a system of mountains in eastern to northeastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period. They ...

. Ecosystems of piedmonts (foothills) are often known as submontane zones, relating to the higher

montane ecosystems Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...

References

{{Portal bar, Mountains Hills Slope landforms