Navajo Nation is facing many environmental issues related to climate change. Degradation of Pinyon Pine (Pinus edulis) forests, among other native plant species, is one of such major on-going environmental challenges for the Navajo Nation. Pinyon pines have ecological and cultural significance for the Navajo people. The objective of this study was to quantify Pinyon Pine trees growth parameters such cones, height and diameter in order to assess Pinyon Pine forest‚s health and productivity. The study was conducted in Black Mesa located in the northeast region of the state of Arizona and within the Navajo Nation Reservation. Black Mesa is mostly a forest of Pinyon Pine, Juniper, Ponderosa Pine, and Oak. This environment has sandy shrub land of black sage and snake weed in open fields which are scattered across Black Mesa. We mapped the area of the study and sampled approximately 175 pinyon pine trees. For each tree, we collected and counted cones. Tree height was simultaneously recorded and its diameter at breast height (dbh) measured using a slide caliper. The geographic coordinates (latitude and longitude) of each three location were recorded using a Garmin handheld GPS. The collected data was transferred into MS-Excel then to ARCGIS ‚Äì ARCMAP 10.8 for mapping and geospatial analysis. Results showed that the cones, diameter and tree height varied from 40 to 50; 5 to 61 cm and 160 to 985 cm, respectively. The coefficients of variation (CV) were 3.09% for cones, but 43% for diameter and height suggesting that these tree growth parameters had a high variability. Maps portraying the spatial distribution of trees showed a cluster of pinyon pines in the northern side of the study field. Further geostatistical analysis confirmed the high variability of tree diameter and height of pinyon pine trees across Black Mesa. The results of this study will be very useful for the implementation of pinyon pine management in this area.