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The two giants on the lake's south shore: Tolimán's double summit in a long day from Santiago, and Atitlán, the highest at 3,535 metres, as an overnight with a freezing camp and sunrise over Fuego and the Pacific.
These are proper mountains with faint trails, no huts and no infrastructure, rising above the Tz'utujil town of Santiago Atitlán and San Lucas Tolimán.
Tolimán (3,158 m) is a 7–8 hour return from Santiago with about 1,600 metres of ascent, through coffee and cornfields, then steep forest to a shallow crater with twin summits and views straight down to the lake. Atitlán (3,535 m) is the bigger, steeper cone behind it, an active volcano last erupting in the 1850s; it is a two-day trip with a cold camp near the summit and a pre-dawn final climb over loose scree.
Both are only feasible from November to March, and guides are essential: the routes are hard to follow in cloud, and robberies have occurred on remote paths. Expect to pay roughly US$40–60 for a Tolimán guide and US$100 to US$150 for the Atitlán overnight.
Both start from the south shore; arrive the night before.
Leave Santiago Atitlán before dawn with your guide, climbing through coffee and maize on the volcano's lower slopes.
Hours of steep forest trail to the crater rim, then over to the higher of the twin summits for the lake view. Descend the same way.
Climb from the south shore through farms and cloud forest to a camp below the summit cone, around 3,300 metres.
A freezing night with Fuego glowing to the east on clear evenings and the lights of the lake villages below.
Scramble the loose final cone in the dark for dawn over Fuego, Agua and the Pacific coast, then the long descent.
Arrange guides in Santiago Atitlán or through agencies in San Pedro and Panajachel; confirm what the price includes.
For Atitlán you need a warm sleeping bag, tent and stove; some guides supply them for a higher fee.
Lanchas run from Panajachel and San Pedro to Santiago Atitlán; stay there the night before.
Lake Atitlán practical notes →Wikimedia Commons photographs are used under their licences.
