![Great Sand Dunes National Park entrance sign 1](https://farm5.staticflickr.com/4428/35683362603_927ecf541a_c.jpg)
Great Sand Dunes National Park entrance sign
大沙丘國家公園(Great Sand Dunes National Park and Preserve)位於科羅拉多州薩沃奇郡(Saguache County, Colorado)和阿拉莫薩郡(Alamosa County, Colorado)的最西邊,於2004年9月13日才剛從國家保護區(National Monument)升格為美國第58座國家公園,是美國目前最年輕的一座國家公園,總計面積約為85,000英畝(340平方公里),號稱是美國的「撒哈拉沙漠」,該公園五年前已來過,此趟特別帶小女兒到此一遊。
沙丘的形成
大沙丘形成年代估計約在一萬兩千年至百萬年間,而橫亙在沙丘東邊及北邊的山脈和隘口則是形成大沙丘的重要因素。
此地區盛行的西南風遠從六十多哩外的San Juan 山脈帶來大量的砂,吹過San Luis山谷後來到Sangre de Cristo山脈,西南風所夾帶的砂受阻於高大的Sangre de Cristo 山脈,於是便堆積在這個谷地;另一方面從東北方向吹來的風暴從Sangre de Cristo 山脈的隘口吹下來,於是山谷中的沙受到兩個不同方向風的吹襲下慢慢的垂直堆高起來,久而久之形成一座座的砂丘,終於形成今日的大沙丘。
春季及初夏山上融雪之際Medano Creek流經大沙丘東、南谷地,小河邊擠滿戲水的遊客活像是內陸裡的一處海邊大沙灘;每年的五月和六月是到河邊玩的最佳時候,一到七月河水就乾涸了,原來的河道變成一大片沙灘,根本看不出雪融之季這裡是一條流水潺潺的河道。
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Dusk at Medano Creek
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![Great Sand Dunes National Park entrance sign 2](https://farm5.staticflickr.com/4438/35656739854_f7d64ac7a2_c.jpg)
Great Sand Dunes National Park entrance sign
我們在爬完Zapata Falls之後回到CO-150 N公路右轉北行,再行約8.7哩抵達大沙丘國家公園(Great Sand Dunes National Park and Preserve)遊客中心,但遊客中心已關門,再行0.9哩抵達停車場,抵達停車場時是下午六點三十分左右,天氣不是很好,烏雲蠻多的,但偶而穿透過雲層的陽光灑落在浩瀚的沙丘上還是很壯觀,我們打算再此看看黃昏的沙丘後再去旅館。
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傍晚風大,吹起的細沙打在臉上、腿上,貝貝痛得哇哇大叫;網路上提出警告:伸縮鏡頭相機小心照顧,否則細沙可能會卡住鏡頭!
![Dusk at Great Sand Dunes National Park (8)](https://farm5.staticflickr.com/4373/36354326751_98bfccd202_c.jpg)
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欣賞完夕陽後我們才開車到今晚住宿的旅館;我們今晚住宿距公園車程約50分鐘的Monte Vista。
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