Outstanding operator running volcano boarding trips on Cerro Negro (US$30) and hikes up the Telica (US$55), Momotombo (US$55), Cosigüina (US$55), El Hoyo (US$60) and San Cristóbal (US$60) volcanoes. Profits from this outstanding operator go to Las Tias, a charity that helps children from underprivileged areas learn to build their own lives, and other worthy causes; volunteers are very welcome.