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- Ian's Gully
- Iceberg Lake
- Iceberg Lake via 19 Mile Creek
- Ice Box Canyon
- Ice Cream
- Icefall
- Icefall Approach
- Icefall Chute
- Icefloe Lake and Avalanche Divide
- Ice Lake Basin
- Ice Lake Basin
- Ice Q and Gaislacher See Lake
- I.D. Low
- Ifen Hahnenköpfle Schneiderkürenalpe Wäldele
- Ifen Wäldele
- Iglmoos Runde
- Iglmoos Runde
- Il giardino dei Marchesi by Cristian Mustazzu
- Il Percorso del Riccio
- Il sentiero Rusca
- Imbodentinden
- Imlil to Tizi Oussem
- Imperial
- In between lake line
- Inca Trail to Machu Picchu
- In Deep
- Independence Pass
- Independence Pass
- Indiana Gulch
- Indian Head Mountain Loop
- Indian Head Mountain Loop
- Indian Maiden Falls
- Indian Meadow Nature Trail
- Indian Ridge
- Indicator Chutes
- Indren - Canale dell' Aquila
- Inferno Cone
- Infinity trail
- Ingegnere
- Ingleborough
- Ingleborough Summit
- Ingleton Waterfalls Trail
- Inner Armadillo's Last Stand
- Inner Basin Loop
- Innerferera to Jenatsch Hut
- Innerleithen Red XC Loop
- Inner Tatamgouche
- In-N-Out Burger Loop
- Innsbruck Alm Crawl
- Inspiration Point and Muir Peak
- Interdune Boardwalk
- Into the Mystic -> Lord of the Squirrels
- Ionia NE Buttress
- Ippočohkka (1727 metres)
- Iron Canyon
- Iron Horse Trail
- Iron Horse Trail
- Iron Horse Trail
- Iron Keld and Loughrigg
- Iron Maiden
- Iron Mountain
- Iron Mountain: Green Trail
- Iron Mountain: North Side of Skyline Drive
- Iron Mountain: Red Trail
- Iron Mountain: Yellow Trail
- Ironwood Loop
- Irton Fell and the Old Coffin Road
- Isards
- Iseler to Kühgundkopf Ridge Trail Run Loop
- Island of the Sun
- Isle Du Bois: Loops A, B & C
- Isle Du Bois: Loops A, B & C
- Isle of Dogs and Mudchute Farm
- Israel National Trail
- Is-Salvatur (Our Saviour Statue)
- Issanger Loop
- ISS Flow
- Isskogel
- Isskogel Loop
- ISS Natural