Colorado Ponderosa Pine Old-Growth Study

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson

Cal-Wood Education Center, Roosevelt National Park by Phil Robertson