It has taken a long time but Phou Pha Thi Mountain, also known as Lima Site or LS 85, will be opened up for tourism. The official opening will be on
13 March 2018 which is 50 year and 2 days after the radar site also known as the Tacan/TSQ 81 site (No. 1 on the second picture above) was overrun in the early morning of March 11, 1968 by Vietnamese sappers who managed to climb up the mountain using the almost vertical mountain side. See also
Battle of Lima Site 85
The Ladder leading to the top (No. 4 on the second picture above) has been replaced by a metal ladder system running all the way from the army post which was reachable by car and motorbike up to the army post shown on the first picture on the cliff shown on the next four pictures below.
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After climbing the ladder, it is still a steep uphill slog to the place where the Tacan/TSQ 81 site was located at the top of the mountain.
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The army post which could be reached by motorbike and car has been replaced by a new building which probably presumably will house an army post as well as an information center and have a parking area while the access road has been upgraded and widened.
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The location of LS 85
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A high res video (Copyright Ivieng Phonevilay) of the site can be found here:
By the way, even-though local people have been on the top of the mountain, access is still restricted and a group of 4 Americans were told about 2-3 weeks ago by army personnel stationed in Ban Houaymo on Rd. 3203 (Xam Nuea to Mueang Xon) that they could not go to LS 85