tunnels, which are about tall and wide, are safe to enter. They end abruptly after about and are home to glowworms and cave weta. The Woodstock Underground Pumphouse in the Waitawheta Gorge is also still accessible via a short detour from the Crown Tramway Track. The East Coast Main Trunk Railway used to run through the gorge until it was bypassed by the Kaimai Deviation. The Karangahake Gorge section of the line, including a 1100-metre tunnel, is now a combined walkway and cycleway, part of the Hauraki Rail Trail, and together with the natural sights of the gorge, makes it into a well-visited local tourist attraction. The railhead at the Waikino end of the gorge still exists, preserved as part of the Goldfields Railway to Waihi. Demographics Karangahake is defined by Statistics New Zealand as a rural settlement and covers . It is part of the wider Paeroa Rural statistical area. Karangahake had a population of 321 at the 2018 New Zealand census, an increase of 24 people (8.1%) since the 2013 census, and unchanged since the 2006 census. There were 138 households, comprising 165 males and 159 females, giving a sex ratio of 1.04 males per female, with 45 people (14.0%) aged under 15 years, 30 (9.3%) aged 15 to 29, 165 (51.4%) aged 30 to 64, and 75 (23.4%) aged 65 or older. Ethnicities were 98.1% European/Pākehā, 13.1% Māori, 0.9% Pacific peoples, 0.9% Asian, and 0.9% other ethnicities. People may identify with more than one ethnicity. Although some people chose not to answer the census's question about religious affiliation, 57.9% had no religion, 27.1% were Christian, 0.9% were Buddhist and 6.5% had other religions. Of those at least 15 years old, 39 (14.1%) people had a bachelor's or higher degree, and 69 (25.0%) people had no formal qualifications. 12 people (4.3%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 108 (39.1%) people were employed full-time, 39 (14.1%) were part-time, and 18 (6.5%) were unemployed. Education Karangahake School is a co-educational state primary school, with a roll of as of The school was established in 1889. See also Kaimai Range References External links Information on the history of Gold mining in the gorge Canyons and gorges of New Zealand Hauraki District Landforms of Waikato Coromandel Peninsula