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Mui Doi

Mũi Đôi

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Mui Doi (Mũi Đôi) is a granite headland at the tip of the Hon Gom peninsula, in Dai Lanh commune, Khanh Hoa province, Vietnam. Vietnamese Wikipedia gives its surveyed position as 12°38'39" N, 109°27'50" E[1]; a triangular granite marker completed on the rocks in 2017 is inscribed with that position rounded to the nearest whole minute, 12°39'0" N, 109°28'0" E, a point about 700 m away[1]. About 500 m offshore lies the islet of Hon Dau, which forms point A7 of Vietnam's maritime baseline[1].

The headland, together with Hon Dau, was recognised as a national scenic landmark by Decision 13 of the Ministry of Culture and Information in 2005[1]. Vietnamese Wikipedia states that Vietnam's grade 12 geography textbook and the country's Department of Survey, Mapping and Geographic Information confirm Mui Doi, rather than Mui Dien, as the easternmost point of the mainland[1].

Mui Dien (also called Dai Lanh cape), the rival claim, lies at 12°52'48" N, 109°27'06" E according to the Mui Doi article[1]. It is now in Hoa Xuan commune, Dak Lak province[2], itself formed when the former Phu Yen province was merged into Dak Lak on 30 June 2025[3]. Vietnamese Wikipedia's own article on Mui Dien describes it as having gradually come to be regarded as the second easternmost point, after Mui Doi[2].

Geography

Mui Doi sits at the tip of the Hon Gom peninsula at 12°38'39" N, 109°27'50" E, which Vietnamese Wikipedia reports as the result of precise observation and survey[1]. A triangular granite marker on the rocks, completed in 2017, carries an inscription giving the same position rounded to the nearest whole minute, 12°39'0" N, 109°28'0" E, which falls about 700 m to the north and east; the article does not say who fixed the inscribed figure[1]. About 500 m offshore lies the islet of Hon Dau, which forms point A7 of Vietnam's maritime baseline[1].

The headland is in Dai Lanh commune, Khanh Hoa province[1]. Resolution 1667/NQ-UBTVQH15 of 16 June 2025 arranged the whole of the former Van Thanh, Van Tho and Dai Lanh communes into a new commune named Dai Lanh, operating from 1 July 2025[6]; Vietnamese Wikipedia summarises the same act as the two former communes of Van Thanh and Van Tho merged into Dai Lanh, which would make the present commune an enlargement rather than a new unit[4]. The commune covers 171.04 km² and had a 2025 population of 25,644[4].

Recognition as the easternmost point

Mui Doi and the offshore islet of Hon Dau were recognised as a national scenic landmark by Decision 13 of the Ministry of Culture and Information in 2005[1]. Vietnamese Wikipedia states that Vietnam's grade 12 geography textbook and the country's Department of Survey, Mapping and Geographic Information confirm Mui Doi as the easternmost point of the mainland, rather than the rival claim of Mui Dien[1].

The Mui Dien rivalry

Mui Dien, also called Dai Lanh cape, lies at 12°52'48" N, 109°27'06" E according to the Mui Doi article[1], to the north and west of Mui Doi. It is now in Hoa Xuan commune, Dak Lak province[2], after the former Phu Yen province, where the cape used to lie, was merged into Dak Lak on 30 June 2025[3]. Vietnamese Wikipedia's own article on Mui Dien states that it has gradually come to be regarded as the second easternmost point of the mainland, after Mui Doi[2].

Terrain and access

The cape projects from the end of the Hon Gom sandbar, described by one published travel guide as projecting almost 30 km into the East Sea[5]. The same guide describes the route to the cape as a round trip of about 20 km on foot across the peninsula's dunes and scrub, or a boat crossing from Dam Mon of about 5 km, taking around 45 minutes[5].

Questions and answers

Why is Mui Doi considered Vietnam's easternmost point rather than Mui Dien?

Vietnamese Wikipedia states that the country's grade 12 geography textbook and its Department of Survey, Mapping and Geographic Information confirm Mui Doi over Mui Dien, which lies further north and west[1].

When was Mui Doi given protected status?

In 2005, when the Ministry of Culture and Information recognised Mui Doi and the offshore islet Hon Dau as a national scenic landmark by Decision 13[1].

Sources

Every figure in this article is cited to one of these pages, listed in order of first use, with the date it was read.

  1. Mũi ĐôiWikipedia (vi) (vi.wikipedia.org) · read · coordinates, marker, Hon Dau and baseline point, 2005 designation, textbook and department confirmation, Mui Dien coordinates
  2. Mũi ĐiệnWikipedia (vi) (vi.wikipedia.org) · read · Mui Dien's current commune and province, second-easternmost description
  3. Công bố sáp nhập tỉnh Phú Yên - Đắk Lắk vào ngày 30/6/2025Cổng thông tin điện tử xã Hòa Hiệp, Đắk Lắk (hoahiep.daklak.gov.vn) · read · date of the Phu Yen to Dak Lak provincial merger
  4. Đại LãnhWikipedia (vi) (vi.wikipedia.org) · read · area and population of Dai Lanh commune; its own summary of the merger, which names two communes
  5. Hon Gom SandbarVietnam Coracle (Luke Digweed) (vietnamcoracle.com) · read · peninsula length, on-foot and boat route distances to the cape
  6. Toàn văn Nghị quyết số 1667/NQ-UBTVQH15 sắp xếp các ĐVHC cấp xã của tỉnh Khánh Hòa năm 2025Cổng Thông tin điện tử Chính phủ (xaydungchinhsach.chinhphu.vn) (xaydungchinhsach.chinhphu.vn) · read · Đại Lãnh clause: three communes into a new commune of the same name, effective 1 July 2025

See also

Categories: Bays and lagoons Van Ninh