Question: The Rocky Mountain ponderosa pine forest, is a forest plant community at an elevation of 2100, in which U.S. state, it's an important temperate coniferous forest ecoregion, including some endemic wildlife, and grass species that are only found in the Pinus ponderosa, commonly known as the ponderosa pine, bull pine, blackjack pine, or western yellow-pine, is a very large pine tree species ?
Context: The Rocky Mountain ponderosa pine forest is a forest plant community at an elevation of 2100 - in the Rocky Mountains, in the U.S. state of Colorado.  It is an important temperate coniferous forest ecoregion, including some endemic wildlife and grass species that are only found in this ponderosa pine ("Pinus ponderosa") habitat. The Bahamian pineyards are a tropical and subtropical coniferous forest ecoregion in The Bahamas and the Turks and Caicos Islands, where they occur on an area of 2100 km2 .  Pineyards are found on four of the northern islands in The Bahamas: Andros, Abaco, Grand Bahama, where they cover half of the island, and New Providence, as well as the Caicos Islands.  Pineyards are dominated by Bahamian pine ("Pinus caribaea" var.  "bahamensis"), while pinepink ("Bletia purpurea"), bushy beard grass ("Andropogon glomeratus"), southern bracken fern ("Pteridium aquilinum"), Florida clover ash ("Tetrazygia bicolor"), Bahamian trumpet tree ("Tabebuia bahamensis"), West Indian snowberry ("Chiococca alba"), devil's gut ("Cassytha filiformis"), poisonwood ("Metopium toxiferum"), coontie ("Zamia integrifolia") and Florida silver palm ("Coccothrinax argentata") grow in the understory.  Without regular wildfires, pineyards will be supplanted by broadleafed coppice.  Young Bahamian pines require extensive amounts of sunlight to grow, and are resistant to fire once they become adults.  Fauna found in the pine forests includes rock iguanas ("Cyclura" spp.) , pygmy boas ("Epicrates" spp.) , the West Indian woodpecker ("Melanerpes superciliaris"), the Bahama woodstar ("Calliphlox evelynae"), the Bahama yellowthroat, ("Geothlypis rostrata"), and the buffy flower bat ("Erophylla sezekorni").  Kirtland's warblers ("Dendroica kirtlandii") migrate from jack pine forests in the Lower Peninsula of Michigan to Bahamian pineyards every year, where they spend the winter. Niwot Ridge is a UNESCO Biosphere Reserve located 65 km north-west of Denver in north-central Colorado.  Habitats include western spruce-fir forest, lodgepole pine ("Pinus contorta") subalpine forest, alpine meadows as well as ponderosa pine ("Pinus ponderosa") shrubland.  The site is little influenced by human impact and is thus an excellent site to monitor biological, chemical, and physical responses to changes in atmospheric chemistry and climate.  The biosphere reserve is administered cooperatively by the U.S. Forest Service and the University of Colorado for experimental and long-term studies of alpine tundra. The maritime coast range ponderosa pine forests are rare temperate forest assemblages associated with a limited range portion of the Santa Cruz Mountains of northern California.  There are only three known small forests of this type, all situated in Santa Cruz County, California.  The dominant tree species is the ponderosa pine. Pinus arizonica, commonly known as the Arizona pine, is a medium-sized pine in northern Mexico, southeast Arizona, southwest New Mexico, and western Texas in the United States.  It is a tree growing to 25–35 m tall, with a trunk diameter of up 1.2 m .  The needles are in bundles of 3, 4, or 5, with 5-needle fascicles being the most prevalent.  This variability may be a sign of hybridization with the closely related ponderosa pine ("Pinus ponderosa").  The cones are single, paired, or in whorls of three, and 5–11 cm long. Pinus ponderosa, commonly known as the ponderosa pine, bull pine, blackjack pine, or western yellow-pine, is a very large pine tree species of variable habitat native to the western United States and Canada.  It is the most widely distributed pine species in North America. Arceuthobium campylopodum is a species of dwarf mistletoe known as western dwarf mistletoe.  It is native to the low to moderate elevation coniferous forests of western North America.  It is a common parasite of several species of pine tree, including Jeffrey Pine, Ponderosa Pine, and Coulter Pine.  The dwarf mistletoe is a greenish-yellow structure above the bark of the tree, while most of the plant is beneath the bark.  Seeds mature during the fall and disperse to nearby trees. The Atlantic coastal pine barrens is a temperate coniferous forest ecoregion of the Mid-Atlantic and northeastern United States distinguished by its nutrient-poor, often acidic soils and a pine tree distribution naturally controlled by frequent fires. The Big Tree (also known as the Trout Lake Big Tree) was a massive Ponderosa pine tree in old growth pine and fir forest in southern Washington state, at the southern base of Mount Adams.  It is managed by the Mount Adams Ranger District of the Gifford Pinchot National Forest.  The tree is 202 ft tall with a diameter of 7 ft , and was one of the largest known ponderosa pine trees in the world.  It had been stressed by attacks from mountain pine beetles and its death in 2015 was confirmed the following year. Pine-pine gall rust, also known as western gall rust, is a fungal disease of pine trees.  This plant disease is caused by Endocronartium harknessii (asexual name is "Peridermium harknessii"), an autoecious, endocyclic, rust fungus that grows in the vascular cambium of the host.  Pine-pine gall rust is found on pine trees ("Pinus" spp.)  with two or three needles such as ponderosa pine, jack pine, and scots pine.  The disease is very similar to pine-oak gall rust, but its second host is another "Pinus" species.  The fungal infection results in gall formation on branches or trunks of infected hosts.  Gall formation is typically not detrimental to old trees but has been known to kill younger less stable saplings.  Galls can vary from small growths on branch extremities to grapefruit sized galls on trunks.
Answer: Colorado