GUNUNG · Indonesia

Osu Nondoto

Osu Nando'oto (ejaan lain: Nandoo'to, Nandooto) — juga disebut Gunung Tangkelemboke. "Osu" berarti gunung dalam bahasa Tolaki-Mekongga; awalan itu dipakai pada hampir semua puncak di rangkaian ini (Osu Samabaheoka, Osu Tangkesawua, Osu Anggondara, Osu Napoha).

Source

Information

Elevation: 2.421 m
Country: Indonesia (ID)
Location / Range: Pegunungan Tangkelemboke, Sulawesi Tenggara. Rangkaian ini terpisah dan berbeda dari Pegunungan Mekongga (sekitar 44 km ke arah barat daya) maupun Taman Nasional Rawa Aopa Watumohai (sekitar 122 km ke arah tenggara) — dua kawasan yang kerap tertukar dengannya. Puncak-puncak lain di rangkaian ini: Osu Samabaheoka 2.027 m, Osu Tangkesawua 1.635 m, Osu Anggondara 1.368 m, dan Osu Napoha 1.320 m. Massif ini adalah menara air bagi tiga sungai besar: Sungai Latoma (Aala) yang mengalir ke selatan, Sungai Lasolo ke timur menuju Konawe Utara, dan Sungai Porehu ke utara menuju Kolaka Utara.
Mountain type: Puncak tertinggi Pegunungan Tangkelemboke, sebuah massif karst (batu gamping) non-vulkanik di jantung Sulawesi Tenggara, tepat di perbatasan Kabupaten Konawe dan Konawe Utara. Bukan gunung api: tidak tercantum dalam daftar gunung api Indonesia milik Smithsonian Global Volcanism Program, dan basis data datagunung.com menggolongkannya sebagai gunung non-vulkanik. Tubuh gunungnya berupa batuan gamping dengan sistem gua labirin, jurang, dan tebing curam. Dengan prominensi sekitar 1.235 m (data Gunung Bagging), Osu Nando'oto berdiri sebagai massif yang benar-benar berdiri sendiri — berbeda dari kebanyakan puncak Sulawesi lain yang hanya tonjolan di atas punggungan.
Volcanic?: No (non-volcanic)
Coordinates: -3.3864, 121.5576
Difficulty: Sangat berat dan bersifat ekspedisi, bukan pendakian akhir pekan. Jalur ke puncak baru dirintis pada 21 Agustus–2 September 2023 oleh sepuluh anggota Mahacala UHO (Mahasiswa Pencinta Alam Universitas Halu Oleo, Kendari) — menurut Gunung Bagging, tidak ada catatan orang mencapai puncak sebelum ekspedisi itu. Titik start di Desa Nesowi berada pada 200 mdpl, sehingga total kenaikan ke puncak sekitar 2.221 meter. Catatan tim perintis mencantumkan tujuh camp berturut-turut (Camp I dan II di tepi Sungai Latoma, Camp III di punggungan 830 mdpl, lalu 1.200 m, 1.600 m, 2.050 m, dan 2.100 m) — artinya ini perjalanan berhari-hari, bukan pendakian sehari. Ruas awal menyusuri Sungai Aala/Latoma sampai ke hulunya sebelum naik ke punggungan. Air melimpah sampai sekitar Camp III dan menjadi langka di atasnya. Medannya hutan primer di massif karst tanpa jalur mapan; tidak ada penanda, pos jaga, atau warung.
Best Season: Belum ada rekomendasi musim resmi. Data iklim yang menyertai artikel Wikipedia Cebuano (diturunkan dari basis data iklim global) mencatat suhu rata-rata sekitar 19 °C, bulan terpanas Oktober sekitar 21 °C dan terdingin Juni sekitar 18 °C, dengan curah hujan tahunan sekitar 3.281 mm. Bulan terbasah Juli (sekitar 437 mm) dan terkering Oktober (sekitar 54 mm), sehingga secara statistik periode paling kering jatuh sekitar September–Oktober. Ekspedisi perintis Mahacala UHO sendiri berlangsung akhir Agustus–awal September. Catatan tim juga menyebut ruas jalan kerikil menuju Desa Nesowi rusak dan makin sulit dilalui pada musim hujan.
Permits & Rules: Tidak ada sistem tiket, kuota, atau retribusi resmi — akses diatur secara informal. Catatan tim perintis dan Gunung Bagging menyebut pendaki perlu melapor ke BASARNAS, ke Polsek Abuki (di Asolu), dan meminta izin kepada pemerintah Desa Nesowi; menginap biasanya di rumah warga atau di rumah kepala desa yang juga berfungsi sebagai camp utama. Rute akses: Kendari → Unaaha (sekitar 1,5 jam) → Asinua (1 jam) → Latoma Jaya (1 jam) → Desa Nesowi (1 jam), aspal lalu kerikil rusak. Status kawasannya adalah kawasan lindung di bawah KPHL Laiwoi (Dinas Kehutanan Sulawesi Tenggara) — bukan cagar alam, suaka margasatwa, atau taman nasional. Simpul puncak berada di dalam poligon hutan lindung yang dipetakan di OpenStreetMap dengan rujukan SK. 465/Menhut-II/2011.
Hazards: Tidak ada catatan kecelakaan atau operasi SAR yang ditemukan — kemungkinan besar karena sangat sedikit orang yang pernah ke sana. Risiko yang bisa disebut berdasarkan sumber: medan karst dengan jurang, tebing curam, dan sistem gua labirin; hutan primer rapat tanpa jalur bertanda sehingga navigasi sepenuhnya bergantung pada GPS dan pemandu lokal; jarak evakuasi sangat panjang (tujuh camp dari desa terdekat); ketiadaan sumber air di atas Camp III; curah hujan tinggi (sekitar 3.281 mm/tahun) yang membuat penyeberangan Sungai Latoma bisa naik cepat. Laporan ekspedisi 2023 juga mencatat perjumpaan dengan Python reticulatus sepanjang sekitar 7 meter. Ancaman terhadap kawasan — bukan terhadap pendaki — adalah deforestasi dan ekspansi tambang nikel di sekitarnya, yang menjadi alasan utama munculnya usulan status taman nasional.

Description

Osu Nondoto — spelled locally as Osu Nando'oto and often called Gunung Tangkelemboke — is a 2,421-metre summit in Konawe Regency, Southeast Sulawesi, and the second-highest peak in the province after Mekongga. The word "Osu" means mountain in the Tolaki-Mekongga language, and the prefix recurs throughout the range: Osu Samabaheoka (2,027 m), Osu Tangkesawua (1,635 m), Osu Anggondara (1,368 m), Osu Napoha (1,320 m). The spelling "Nondoto" used by international databases is an older, incorrect form; Gunung Bagging notes the peak was "previously listed as Osu Nondoto". Unlike most Indonesian mountains, Osu Nando'oto is not a volcano. It is the high point of a limestone karst massif with labyrinthine cave systems, ravines and steep cliffs, straddling the border between Konawe and North Konawe regencies. Its prominence is about 1,235 metres, making it a genuinely free-standing massif rather than a bump on a plateau. The Tangkelemboke range acts as the water tower for three major Southeast Sulawesi rivers: the Latoma (Aala) to the south, the Lasolo east toward North Konawe, and the Porehu north toward North Kolaka. Worth stating plainly, because it is often confused: this peak is not part of the Mekongga range (about 44 km to the south-west) nor of Rawa Aopa Watumohai National Park (about 122 km to the south-east). What makes the mountain remarkable is how recent its documentation is. The route to the summit was only pioneered between 21 August and 2 September 2023, by ten members of Mahacala UHO, the nature-lovers' club of Halu Oleo University in Kendari, led by Ma'ruf Asraruddin with M. Ridwan heading the research side and Asramil Jamil as operations commander. The expedition started from Desa Nesowi in Latoma district at 200 m above sea level, followed the Aala Latoma river to its headwaters, gained the ridge, and set seven successive camps before reaching the top — roughly 2,221 metres of total ascent. The team published the coordinates of each camp on their own blog, which remains the only publicly available route guide. The 2023 expedition was more than a climb; it was designed as a biological survey from 200 m to over 2,400 m. Its findings included orchids, pitcher plants, begonias, mosses, fungi and rattan on the flora side, and highland anoa, Macaca nigra, tarsiers, civets, otters, hornbills, Sulawesi eagles, eels, a reticulated python of about seven metres, frogs, lizards, Apis dorsata bees and a range of butterflies and highland birds on the fauna side. Out of that came a campaign to upgrade the area's status to a nature reserve, wildlife sanctuary or national park — it currently holds only protection-forest status under KPHL Laiwoi. Attention has grown since. The French NGO Naturevolution, which ran a pre-expedition with a Southeast Sulawesi BKSDA officer in February 2023, launched a four-week main expedition on 17 November 2025 with Halu Oleo University researchers and international volunteers, led by Evrard Wendenbaum, to document flora, endemic trees and unexplored caves. On 6 January 2026, a landscape of roughly 6,000 km² covering Sombori, Matarombeo, Tangkelemboke and Mekongga was formally proposed as a national park as well as a UNESCO Global Geopark and Biosphere Reserve. The provincial government confirmed the area holds no conservation status yet and has no active mining permits inside it — while deforestation and nickel expansion nearby are repeatedly cited as the reason protection is urgent. For hikers the implication is clear: this is not a weekend mountain. There is no ticket, quota, registration post, trail marking or shop. There is only informal permission from BASARNAS, the Abuki police post and the Nesowi village government; a bed in a villager's house; and then days of walking through primary forest with water running short above Camp III. No freely licensed summit photograph exists, so this page is deliberately left without one — the only visual record is the Mahacala UHO expedition footage referenced in the experiences section.

Routes

Jalur rintisan Desa Nesowi (Kec. Latoma, Konawe) — via hulu Sungai Aala Latoma

Sangat berat / bersifat ekspedisi — kenaikan ±2.221 m dari 200 mdpl ke 2.421 mdpl, hutan primer tanpa jalur bertanda, navigasi GPS + pemandu lokal

Ekspedisi berhari-hari; tim perintis 2023 menempuh 21 Agustus–2 September 2023 dengan tujuh camp berturut-turut

Satu-satunya jalur ke puncak yang pernah didokumentasikan, dirintis oleh Mahacala UHO (Universitas Halu Oleo, Kendari) pada 21 Agustus–2 September 2023; menurut Gunung Bagging tidak ada catatan orang mencapai puncak sebelum itu. Titik berangkat adalah rumah kepala desa di Desa Nesowi, Kecamatan Latoma, Kabupaten Konawe, pada 200 mdpl, yang juga menjadi camp utama. Ruas awal menyusuri Sungai Aala Latoma ke arah hulu dengan Camp I (3°29'31,78" LS 121°33'50,64" BT) dan Camp II (3°26'58,97" LS 121°34'45,82" BT) di tepi sungai, lalu naik ke punggungan di Camp III pada 830 mdpl (3°24'44,07" LS 121°36'26,16" BT). Dari sana jalur mengikuti punggungan naik bertahap melalui Camp IV 1.200 mdpl (3°24'17,81" LS 121°36'7,19" BT), Camp V 1.600 mdpl (3°23'36,11" LS 121°35'37,75" BT), Camp VI 2.050 mdpl (3°23'12,12" LS 121°34'45,72" BT), dan Camp VII 2.100 mdpl (3°23'23,10" LS 121°33'46,68" BT) sebelum puncak 2.421 mdpl. Air melimpah sampai sekitar Camp III dan menjadi langka di atasnya, sehingga persediaan harus dipikul dari ruas sungai. Akses ke titik berangkat: Kendari → Unaaha sekitar 1,5 jam, lalu Unaaha → Asinua, Asinua → Latoma Jaya, dan Latoma Jaya → Nesowi masing-masing sekitar 1 jam; ruas akhir berupa jalan kerikil rusak yang memburuk pada musim hujan. Perizinan bersifat informal: lapor ke BASARNAS, ke Polsek Abuki di Asolu, dan minta izin ke pemerintah Desa Nesowi; penginapan di rumah warga. Tidak ada penanda jalur, pos jaga, warung, maupun mekanisme pertolongan di sepanjang rute.

Climbing Experiences

First-hand experience of Osu Nando'oto comes, in practice, from a single event: the route-pioneering expedition by Mahacala UHO, the nature-lovers' club of Halu Oleo University in Kendari, between 21 August and 2 September 2023. According to Gunung Bagging, there is no record of anyone reaching the summit before it. Every available experience source — two write-ups on the team's own blog and four videos — comes from that expedition or covers it directly. The picture that emerges is consistent and important for setting expectations. This is not a weekend hike but a multi-day journey through primary forest. The start point at Desa Nesowi in Latoma district sits at 200 m above sea level, making the total ascent roughly 2,221 metres — more than most popular mountains in Java. The team set seven camps: Camps I and II beside the Latoma river, Camp III on a ridge at 830 m, then successively at 1,200 m, 1,600 m, 2,050 m and 2,100 m. The early section follows the Aala Latoma river to its headwaters before gaining the ridge at Camp III. Water is plentiful along the river section and becomes scarce after Camp III — a point repeated across the Indonesian sources. Getting to the trailhead is part of the trip: Kendari → Unaaha about 1.5 hours, Unaaha → Asinua about 1 hour, Asinua → Latoma Jaya about 1 hour, then Latoma Jaya → Desa Nesowi about 1 hour, the last stretch on damaged gravel road that worsens in the rainy season. Permissions are informal but clear: report to BASARNAS and to the Abuki police post at Asolu, and ask the Nesowi village government; sleep in villagers' houses or at the village head's home, which doubles as the main camp. One thing sets this expedition apart from an ordinary climb: its purpose. It was designed as a biological survey from 200 m to over 2,400 m, and its results fed a campaign to upgrade the Tangkelemboke area — then holding only protection-forest status under KPHL Laiwoi — to a nature reserve, wildlife sanctuary or national park. Reported finds included orchids, pitcher plants, begonias, mosses, fungi and rattan, plus highland anoa, Macaca nigra, tarsiers, civets, otters, hornbills, Sulawesi eagles, eels, a reticulated python of about seven metres, frogs, lizards, Apis dorsata bees, and a range of butterflies and highland birds. An important caveat for anyone tempted to follow: there are no trail markers, guard posts, shops or rescue arrangements anywhere on the route; navigation depends on GPS and local guides; and the evacuation distance from the highest camp to the nearest village is very long. All existing visual documentation is expedition video — there is not a single freely licensed summit photograph.

References

The summary above is compiled from the following sources. Click to explore them yourself.