Alessio Expediciones , C.C. 33, Chacras de Coria, Mendoza (tel & fax 0261/4962201; aconcagua@alessio.com.ar ). One of the best local Aconcagua guiding outfits, used by many international groups. Alquimia , Paseo Artesanal, Local "C", Junín de los Andes (tel 02972/491355 or 02944/1561-0842). Small, enthusiastic agency that organizes climbing expeditions up Lanín and white-water rafting trips on the Río Aluminé. Cumbres y Lagos Patagonia , Villegas 222, Bariloche (tel 02944/423283). Offers white-water rafting trips on the Río Manso ($100 a day). Estancia Huechahue , Junín de los Andes ( huechahue@jandes.com.ar ). Organizes horseriding trips. Estancia La Maipú , Lago San Martín, Santa Cruz (tel 011/4901-5591, fax 4903-4967). Organizes horseriding trips. Fitzroy Expeditions , Lionel Terray 545, El Chaltén, Santa Cruz (tel & fax 02962/49301; troyexp@internet.siscotel.com ). Climbing, horseriding and trekking options, plus glacier iceclimbing and expeditions onto the Southern Polar Icecap. Hostería Ayelén , Pasaje Arrayanes, Casilla de Correo 21 (tel & fax 02972/425660; charlesm@smandes.com.ar ). Experienced fishing guide, Charlie Muspratt, organizes bespoke fishing tours of the Lake District ($160 per day with transport).