Question: Which coast does this trail run along which provides a hiking passage to Kalalau Valley?

Context paragraphs:
La Luz Trail: The La Luz Trail (Trail 137) is a popular hiking trail located on the west face of the Sandia Mountains near Albuquerque, New Mexico.  The trail begins at the La Luz Trailhead and proceeds approximately eight miles to either Sandia Crest or the Sandia Peak Tramway.  The hike is strenuous, with 3775 ft of elevation gain and a grade of 12%.  The trail allows hikers to view the flora and fauna of four climatic zones and the granite cliffs and spires native to the west face of the Sandia Mountains.  It also offers excellent views of Albuquerque, the cinder cones of the Albuquerque Volcanoes, and Mount Taylor.  The La Luz Trail is also home to the La Luz Trail Run.

Kalalau Beach: Kalalau Beach is a beach on the Nā Pali Coast at the base of the Kalalau Valley in north-west Kauaʻ i in Hawaiʻ i.  It is the final destination of the Kalalau Trail, one of the most difficult trails on the Hawaiian Islands.  The beach is approximately 1 mile long, with trails snaking through the rest of the valley where people in hiding are rumored to live.  There is a camp site on the beach, with a waterfall providing fresh water and composting toilets available.  Camping requires a permit.  All trash must be packed out.  The beach is beautiful and secluded.

Richard Burgunder: Richard Burgunder (born 14 November 1979) is an American extreme sports athlete, adventurer, and mountaineer.  Burgunder is a five-time Paul Mitchell XTERRA Trail Run Series Regional Champion and is the only runner in XTERRA Trail Run Series history to earn titles in four different regions.  Burgunder has regional championship titles in New England (2009), northern Ohio (2011), Pocono (2011 and 2012), and Utah (2013).  Burgunder made history in 2011 by winning XTERRA regional championships in two different regions.

Stenogyne campanulata: Stenogyne campanulata is a rare species of flowering plant in the mint family known by the common name Kalalau Valley stenogyne.  It is endemic to Hawaii, where it is known only from the Kalalau Valley on the island of Kauai.  It is a federally listed endangered species of the United States.

Rhodes Trail Run: The Rhodes Trail Run is a 52 km trail run that takes place in the southern Drakensberg of South Africa.  The event starts in the Victorian-era hamlet of Rhodes at an altitude of 1800m (5905 ft), and climbs (at one stage the gradient is 1:3) to 2677m (8782 ft) at Lesotho View (on the Lesotho border) running along the Ben MacDhui snowfields before returning to Rhodes.

Kalalau Trail: The Kalalau Trail is a trail along Nā Pali Coast of the island of Kauai in the state of Hawaii.  The trail runs approximately 11 mi along the island's north shore from Keʻ e Beach to the Kalalau Valley.  The trail has been named one of the most beautiful, and dangerous, hikes in the world.

Kalalau Valley: The Kalalau Valley is located on the northwest side of the island of Kauaʻ i in the state of Hawaiʻ i.  The valley is located in the Nā Pali Coast State Park and houses the Kalalau Beach.  The Nā Pali Coast is rugged and is inaccessible to automobiles.  The only legal ways to access the valley are by kayak or by hiking the Kalalau Trail.

Martin Creek Trail: Martin Creek Trail is in the northern Sawatch Range, part of the Rocky Mountains in the U.S. state of Colorado.  It is located in the Holy Cross Wilderness east of Grouse Mountain in Eagle County.  Martin Creek Trail is south of Interstate 70, near Minturn, southwest of Vail and southeast of Avon, Colorado.  Martin Creek Trail is located at the northeastern edge of Holy Cross Wilderness Area, southeast of Grouse Mountain.  Martin Creek Trailhead parking area is located at 7,950 feet.  A junction in the trail one mile from the trailhead, at 8,760 feet, permits passage north to meet the Grouse Creek Trail that ends north of Minturn at the base of Meadow Mountain.  A few tenths of a mile west of the junction is the marker for the boundary of Holy Cross Wilderness Area, at 9,000 feet.  Mount of the Holy Cross may be viewed across the valley of Cross Creek from the log cabin ruins of a homestead three miles and three hours up the trail, at 10,270 feet.  The Martin Creek Trail ends after five miles, at an elevation of 10,730 feet.  Hiking Colorado: Holy Cross Wilderness, a hiking guide by Kim Fenske, provides a description of Martin Creek Trail.

Hanakoa Valley: Hanakoa Valley is a hanging valley along the Kalalau Trail along the Nā Pali Coast of the island of Kauai in the state of Hawaii.  Hanakoa has primitive camping via permit only.  It is located on mile 6 of the Kalalau Trail, often used as a resting destination for hikers completing the Kalalau Trail to Kalalau Valley.  Nearby Hanakoa Falls is accessible by an unmaintained trail.

Knee Knackering North Shore Trail Run: The Knee Knackering North Shore Trail Run, also known as the Knee Knacker, was established in 1989 and is a 50 km ultramarathon trail run in that takes place in British Columbia, in the Greater Vancouver area on the second Saturday of July each year.  Due to a municipality's environmental concerns, the field is limited to 200 runners.  Because of the race's popularity, the entrants are selected by lottery.  The route, comprising about 2,600 m of vertical climb and descent, generally follows the Baden-Powell Trail, and traverses the North Shore Mountains from Horseshoe Bay to Deep Cove.

Supporting paragraphs: Kalalau Valley Kalalau Trail
Answer: Nā Pali Coast