Question: 2.9 miles away from a peak 28 mi northwest of the Las Vegas Strip, is  the highest mountain in both the Spring Mountains and Clark County, making it what?

Context paragraphs:
Mormon Mountains: The Mormon Mountains are located in Lincoln and Clark counties in Nevada, between 16 and 28 mi northwest of Mesquite on I–15 in the Virgin Valley, east of the Meadow Valley Mountains and Meadow Valley and northeast of Moapa Valley.  The highest point in the range is Mormon Peak, at 7414 ft above sea level.  Another smaller mountain range lies to the east, called the East Mormon Mountains.  The south fork of the Toquop Wash drains the east side of the range and continues on through the N–S linear ridge of the East Mormon Mountains.

Clark County Water Reclamation District: The Clark County Water Reclamation District (District) is a government wastewater treatment agency in Clark County, Nevada.  As a member of the Southern Nevada Water Authority, its mission is to treat millions of gallons of wastewater that is produced every day.  The District is the largest water treatment agency in Southern Nevada and is responsible for treating wastewater from unincorporated parts of Clark County within the Las Vegas Valley, including most of the Las Vegas Strip, and the communities of Blue Diamond, Moapa Valley, Nevada, Indaian Springs, Nevada, Laughlin, Nevada, and Searchlight.

Harris Mountain (Nevada): Harris Mountain is a peak in the Spring Mountains of southern Nevada, USA.  It is 29 mi northwest of the Las Vegas Strip.  It is in the Mount Charleston Wilderness.

Las Vegas Strip: The Las Vegas Strip is a stretch of South Las Vegas Boulevard in Clark County, Nevada, known for its concentration of resort hotels and casinos.  The Strip is approximately 4.2 mi in length, located immediately south of the Las Vegas city limits in the unincorporated towns of Paradise and Winchester.  However, the Strip is often referred to as being in Las Vegas.  Most of the Strip has been designated an All-American Road, and is considered a scenic route at night.

Griffith Peak: Griffith Peak is located in the Spring Mountains in Clark County of southern Nevada.  It is approximately 28 mi northwest of the Las Vegas Strip and 3.9 mi southeast of Mount Charleston.

Mount Charleston: Mount Charleston, officially named Charleston Peak, at 11916 ft , is the highest mountain in both the Spring Mountains and Clark County, in Nevada, United States.  It is the eighth-highest mountain in the state.  Well separated from higher peaks by large, low basins, it is the most topographically prominent peak in Nevada, and the eighth-most-prominent peak in the contiguous United States.  It is located about 35 mi northwest of Las Vegas within the Mount Charleston Wilderness, which is within the Spring Mountains National Recreation Area of the Humboldt-Toiyabe National Forest.

Las Vegas Monorail: The Las Vegas Monorail is a 3.9 mi monorail mass transit system located adjacent to the Las Vegas Strip, in Clark County, Nevada, United States.  It connects several large casinos in the unincorporated communities of Paradise and Winchester, and does not enter the City of Las Vegas.  It is owned and operated by the Las Vegas Monorail Company.  In 2013, total annual ridership was roughly 4.2 million, down from a pre-Great Recession peak of 7.9 million in 2007.  The monorail is a registered not-for-profit corporation, allowed under Nevada law since the monorail provides a public service.  The State of Nevada assisted in bond financing, but no public money was used in construction.

Winchester, Nevada: Winchester is an unincorporated town and census-designated place (CDP) and part of Las Vegas Township in Clark County, Nevada, United States that contains part of the Las Vegas Strip.  It is one of a number of CDPs in the unincorporated urbanized area directly south of Las Vegas.  The population was 27,978 at the 2010 census.  It is governed by the Clark County Commission with advice from the Winchester Town Advisory Board.  "Winchester, NV" does not appear in postal addresses; the United States Postal Service has assigned "Las Vegas, NV" as the place name for the ZIP codes containing Winchester.

Pinal Peak: Pinal Peak, located in southern Gila County, Arizona, is the highest point in the Pinal Mountains, with an elevation of 7,848 ft .  It is the highest point of land located in between the Salt and Gila rivers in Arizona before they merge, making it visible from miles away on a clear day.  The peak ranks as the 11th most prominent in Arizona and has an topographic isolation of 35 mi , with the nearest point of land of equal or greater elevation being to the southeast in the Santa Teresa Mountains.  Pinal Peak is slightly east of the approximate center of the Pinal Mountains.  Despite being the most prominent peak in Gila County, it is not the highest point in the county.  That title goes to Myrtle Point with an elevation between 7963 and(-) , which lies atop the edge of the Mogollon Rim which forms the county line with Coconino County.  The nearest population is in the Globe/Miami, Arizona area, just a few miles north of the range and peak.

Mummy Mountain (Nevada): Mummy Mountain is the second highest peak of the Spring Mountains in Clark County, Nevada, United States.  It is the twentieth highest mountain in the state.  The mountain is located within the Mount Charleston Wilderness and the Humboldt-Toiyabe National Forest.

Supporting paragraphs: Griffith Peak Mount Charleston
Answer: eighth-highest mountain in the state