Bear Brook (Suncook River tributary)

{{about|the stream in central New Hampshire|other locations with this name|Bear Brook (disambiguation)}}

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

{{Infobox river

| name = Bear Brook

| name_native =

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| pushpin_map = New Hampshire#USA

| pushpin_map_size = 200 px

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| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = New Hampshire

| subdivision_type3 = Counties

| subdivision_name3 = Rockingham, Merrimack

| subdivision_type4 = Towns

| subdivision_name4 = Candia, Hooksett, Deerfield, Allenstown

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| length = {{convert|10.0|mi|km|abbr=on}}

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| source1 = Hall Mountain Marsh

| source1_location = Candia, Rockingham County

| source1_coordinates= {{coord|43|5|50|N|71|21|6|W|type:river|display=inline}}

| source1_elevation = {{convert|675|ft|abbr=on}}

| mouth = Suncook River

| mouth_location = Allenstown, Merrimack County

| mouth_coordinates = {{coord|43|10|17|N|71|23|41|W|type:river|display=inline,title}}

| mouth_elevation = {{convert|285|ft|abbr=on}}

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| tributaries_left = Catamount Brook

| tributaries_right = Pease Brook, Little Bear Brook

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Bear Brook is a {{convert|10.0|mi|km|adj=mid|-long}}[http://www.granit.unh.edu New Hampshire GRANIT state geographic information system] stream located in central New Hampshire in the United States. It is a tributary of the Suncook River, part of the Merrimack River (and therefore Gulf of Maine) watershed. Its entire course is within Bear Brook State Park.

Bear Brook begins at the outlet of Hall Mountain Marsh near the four-corner intersection of the towns of Allenstown, Deerfield, Candia, and Hooksett. The brook descends to the north, through Deerfield, then turns west and reenters Allenstown. Nearing Deerfield Road, the brook is impounded by Catamount Pond, with a state park beach and picnic area. The brook flows northwest from the pond and reaches the Suncook River in less than a mile.