Question: The South Fork Breitenbush River flows near the worker-owned co-op surrounded by what national landmark?

Context paragraphs:
East Branch South Fork Eel River: The East Branch South Fork Eel River, a tributary of the South Fork Eel River, is formed by the confluence of Cruso Cabin Creek and Elkhorn Creek, in Mendocino County in the U.S. state of California.  The river is roughly 25 mi long, meandering west to its confluence with the South Fork Eel at Benbow Lake State Recreation Area.  Major tributaries of the East Branch include Buck Mountain Creek, Squaw Creek, Rays Creek, and Tom Long Creek.  The river flows west, turns north, and flows west again, through rugged terrain in the Coast Range of California.  The East Branch is the South Fork Eel's largest tributary.

Breitenbush Lake: Breitenbush Lake is a 65 acre water body on a high plateau north of Mount Jefferson in the Cascade Range in the U.S. state of Oregon.  The lake, fed by seepage and small creeks, is part of the North Fork Breitenbush River watershed.  It is in Marion County near its border with Jefferson County and lies within the Mount Hood National Forest and the Warm Springs Indian Reservation at an elevation of about 5500 ft .

Alsea River: The Alsea River flows 48.5 mi from Alsea, an unincorporated community in the coastal mountains of the U.S. state of Oregon, to the Pacific Ocean near the city of Waldport.  It begins at the confluence of the North Fork Alsea River and the South Fork Alsea River and ends in Alsea Bay, a wide estuary at Waldport.  The river flows generally west-northwest in a winding course through the mountains of southern Benton and Lincoln counties, passing near the unincorporated community of Tidewater and through the Siuslaw National Forest.  Its drainage basin extends into Lane County, along the headwaters of the South Fork Alsea River.

Breitenbush Hot Springs: Breitenbush Hot Springs Retreat and Conference Center (pronunciation: BRIGHT en BUSH), commonly called Breitenbush Hot Springs or simply Breitenbush, is a worker-owned co-op featuring holistic and spiritual retreats.  It is surrounded by the Willamette National Forest in Breitenbush, Marion County, Oregon, United States, 10 mi east-northeast of Detroit along the West Cascades Scenic Byway and 12 mi northwest of Mount Jefferson.  The closest metropolitan area, Salem, is approximately 60 mi to the west.  The retreat center is located at the site of the Breitenbush Hot Springs, which drain into the adjacent Breitenbush River.

Agri (river): The Agri is a river in the Basilicata region of southern Italy.  In ancient times it was known as "Aciris" (Ancient greek: "Akyris", "Ακυρης").  The source of the river is in the Lucan Apennines north of Monte Volturino and west of Calvello in the province of Potenza.  It is near the source of the Basento.  The river flows south near Paterno before curving southeast.  It flows near Tramutola, Viggiano, and Grumento Nova before entering a lake.  After exiting the lake, the river flows eastward near Armento, Missanello, Aliano, and Sant'Arcangelo.  A right tributary, the Racanello, enters the river in this area.  The river forms the border between the province of Potenza and the province of Matera for part of this area of the river.  It flows into a small lake before entering the province of Matera.  The river flows for a short distance before entering Lago di Gannano.  After exiting the lake, the river flows southeast near Tursi, Montalbano Jonico, and Scanzano Jonico before flowing into the Gulf of Taranto near Policoro.

Spring River (Arkansas): The Spring River is a 57 mi long river which flows through the U.S. states of Missouri and Arkansas.  It consists of two branches, the South Fork of the Spring River and the Spring River proper.  The South Fork of the Spring River starts in Howell County, Missouri and flows south through Fulton and Sharp counties in Arkansas.  The South Fork of the Spring River joins the Spring River proper near the town of Hardy, Arkansas.  The South Fork is a quiet stream with gravelly bars that are ideal for camping.

Bradano: The Bradano is a river in the Basilicata and Apulia regions of southern Italy.  Its source is Lago Pesole (which is near Forenza and Filiano) in the province of Potenza.  The river flows southeast near Monte Torretta, Acerenza, and Oppido Lucano.  After crossing into the province of Matera, it is joined by a right tributary, the Alvo.  The river flows near Irsina before being joined by a left tributary, the Basentello.  Shortly after that, it is joined by another right tributary, the Bilioso.  The river then enters Lago di San Giuliano.  After flowing out of the lake, the Bradano is joined by a left tributary, the Gravina, and flows southeast near Montescaglioso before entering the province of Taranto.  It is then joined by a left tributary, the Gravina di Matera, before re-entering the province of Matera after a short distance.  The river flows near the border with the province of Taranto before entering the Gulf of Taranto near Lido di Metaponto.

North Fork Breitenbush River: The North Fork Breitenbush River is a tributary of the Breitenbush River in the U.S. state of Oregon.  It begins at Papoose Lakes near Breitenbush Lake in the Cascade Range north of Mount Jefferson and flows generally northwest and west through the Mount Hood National Forest, Olallie Scenic Area, Mount Jefferson Wilderness, and Willamette National Forest.  It merges with the South Fork Breitenbush River to form the Breitenbush River main stem slightly upstream of Breitenbush Hot Springs.

Basento: The Basento (Latin "Casuentus") is a river in the Basilicata region of southern Italy.  It rises at Monte Arioso in the southern Apennine Mountains, southwest of Potenza in the province of Potenza.  The river flows northeast near Pignola and Potenza before curving east near Vaglio Basilicata.  It curves southeast and flows near Brindisi Montagna, Trivigno, and Albano di Lucania.  A right tributary coming from Lago di Ponte Fontanelle flows into the river in this area.  The river forms the border between the province of Potenza and the province of Matera for a short distance before flowing into the province of Matera.  It flows eastward near Tricarico, Calciano, and Grassano before curving southeast.  The river flows near Grottole, Miglionico, Pomarico, Ferrandina, and Monte Finese before curving eastward.  It flows near Pisticci and Bernalda before flowing into the Gulf of Taranto, which is part of the Ionian Sea, near Metaponto.  The main city on the Basento is Potenza, the capital of Basilicata.

South Fork Breitenbush River: The South Fork Breitenbush River is a 10 mi tributary of the Breitenbush River in the U.S. state of Oregon.  The river flows generally northwest from Russell Lake in the Mount Jefferson Wilderness of the Cascade Range to near Breitenbush Hot Springs, where it merges with the North Fork Breitenbush River to form the main stem.

Supporting paragraphs: South Fork Breitenbush River Breitenbush Hot Springs
Answer: Willamette National Forest