葛仙山鎮(zhen)(zhen)(zhen)位于彭州市中部,東接(jie)紅巖鎮(zhen)(zhen)(zhen),南鄰敖平(ping)軍樂、隆豐三鎮(zhen)(zhen)(zhen),北(bei)界白鹿、通濟鎮(zhen)(zhen)(zhen),西與(yu)丹景山鎮(zhen)(zhen)(zhen)接(jie)壤,地理坐標北(bei)緯31°08′,東經130°57′,距天彭鎮(zhen)(zhen)(zhen)20公里,成都60公里。本鎮(zhen)(zhen)(zhen)以鴨(ya)子河為界,北(bei)是丘陵、低(di)山區,南是廣(guang)袤平(ping)原.
全(quan)境自然條(tiao)件優越(yue),山、丘、壩(ba)俱全(quan),地勢由(you)南向北逐步(bu)升高,最(zui)高點尖峰頂,海拔1362米(mi),最(zui)低(di)點涌泉村劉家院子,海拔662米(mi)。氣候(hou)屬四(si)川盆地亞熱帶季風(feng)濕潤氣候(hou)區(qu),四(si)季分明(ming).
葛仙山(shan)是龍(long)門(men)(men)山(shan)國家級地質公(gong)園、龍(long)門(men)(men)山(shan)風景名勝(sheng)區(qu)的重要組成(cheng)部份。
龍(long)(long)門(men)(men)山(shan)(shan)國(guo)家級地(di)質公(gong)園、龍(long)(long)門(men)(men)山(shan)(shan)風景名(ming)勝區(qu)地(di)處(chu)龍(long)(long)門(men)(men)山(shan)(shan)斷裂帶中南段,地(di)層(ceng)古老,地(di)史久遠。區(qu)內著名(ming)的青(qing)藏(zang)大(da)冰蓋冰川漂礫是20世紀末發現(xian)的世界(jie)罕見(jian)的地(di)質遺跡奇觀(guan),又稱為龍(long)(long)門(men)(men)山(shan)(shan)推覆構(gou)(gou)造,被(bei)譽為“地(di)質科學迷宮(gong)”,宏大(da)的龍(long)(long)門(men)(men)山(shan)(shan)推覆構(gou)(gou)造和壯觀(guan)奇特的彭州飛來峰群,可與(yu)歐洲號(hao)稱“大(da)自然宮(gong)殿”的阿爾卑斯山(shan)(shan)相媲美(mei)。冰川漂礫為世界(jie)導向性自然景觀(guan)資(zi)源,2000年底,龍(long)(long)門(men)(men)山(shan)(shan)被(bei)國(guo)家國(guo)土資(zi)源部批準為首批11個國(guo)家級地(di)質公(gong)園之一。
與塘壩子(zi)相鄰的位于彭州市東北部葛仙(xian)山鎮境內,幅員(yuan)面積13平方公里(li),距(ju)城區(qu)天(tian)彭鎮23公里(li),最高點海拔1322米(mi)。葛仙(xian)山景(jing)區(qu)內溶洞孤(gu)(gu)峰(feng)(feng)拔地(di)而起,溶洞洼地(di)星(xing)羅棋布,素有“九(jiu)妖十(shi)八洞”、“二十(shi)四(si)峰(feng)(feng)、八十(shi)一洞”之妙(miao),葛仙(xian)山以孤(gu)(gu)峰(feng)(feng)挺拔,溶洞幽(you)深為特色(se),座座孤(gu)(gu)峰(feng)(feng)呈三(san)角形(xing),如刀削(xue)斧砍,宛如碩大的群雕造像,令(ling)人(ren)稱奇叫絕。