Wildcat Brook

{{Short description|Stream in New Hampshire, United States}}

{{Use American English|date=February 2025}}

{{Infobox river

| name = Wildcat Brook

| name_native =

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| image = WildcatBrookaboveJacksonFallsMay2023.jpg

| image_size =

| image_caption = Wildcat Brook above Jackson Falls, May 2023

| map =

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| map_caption =

| pushpin_map = New Hampshire#USA

| pushpin_map_size = 250 px

| pushpin_map_caption= Location in New Hampshire##Location in the United States

| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = New Hampshire

| subdivision_type3 = Counties

| subdivision_name3 = Coos, Carroll

| subdivision_type4 = Township and town

| subdivision_name4 = Bean's Purchase, Jackson

| subdivision_type5 =

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| length = {{convert|9.05|mi|km|abbr=on}}

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| source1 = Carter Notch

| source1_location = Bean's Purchase

| source1_coordinates= {{coord|44|15|32|N|71|11|40|W|type:river}}

| source1_elevation = {{convert|3280|ft|abbr=on}}

| mouth = Ellis River

| mouth_location = Jackson

| mouth_coordinates = {{coord|44|8|32|N|71|11|9|W|type:river}}

| mouth_elevation = {{convert|740|ft|abbr=on}}

| progression =

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| tributaries_left = Bog Brook, Davis Brook, Great Brook

| tributaries_right = Little Wildcat Brook, Marsh Brook

| custom_label =

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| extra = {{Designation list

| embed = yes

| designation1 = nwsrs

| designation1_type = Scenic, Recreational

| designation1_date = October 28, 1988

| designation1_number =

}}

}}

Wildcat Brook,{{gnis|872938}} also known as the Wildcat River, is a {{convert|9.05|mi|km|adj=mid|-long}}{{cite web| url=https://www.rivers.gov/rivers/wildcat.php| title=Wildcat Brook, New Hampshire| publisher=National Wild and Scenic Rivers System| access-date=February 22, 2017}} stream in the White Mountains of New Hampshire, in the United States. It rises at Carter Notch in the township of Bean's Purchase in Coos County, and flows south through the town of Jackson in Carroll County to its confluence with the Ellis River near the town's southern boundary. At Jackson Falls, near the town center, the stream descends {{convert|120|ft}} in {{convert|1/4|mi|1}} over granite ledges,{{cite web| url=http://mapper.acme.com/?ll=44.14812,-71.18118&z=15&t=T&marker0=44.14812%2C-71.18118%2CJackson%20Falls%5C%2C%20NH| title=Jackson, New Hampshire| work=U.S. Geological Survey 7.5 minute topographic map series| publisher=Mapper.acme.com| access-date=February 22, 2017}} paralleled by New Hampshire Route 16B (Carter Notch Road). The surrounding area is part of the Jackson Falls Historic District.

Via the Ellis River, Wildcat Brook is part of the Saco River watershed, with its waters reaching the Atlantic Ocean near Biddeford, Maine. The entire brook, from Carter Notch to the Ellis River, is part of the designated National Wild and Scenic River System, as are its tributaries Little Wildcat Brook, Bog Brook, and Great Brook.