Beautiful, restricted-access Avalanche Valley is reachable only by two-hour forest department 'ecotours' from the southern side of Avalanche Lake. Twenty-six-seat minibuses depart at 9.30am, 11.30am, 1.30pm and 3.30pm Monday to Friday, and about 30 minutes later on weekends. Timings, however, are inconsistent, as they leave when full – if you miss a bus you may have to wait a long time for the next one.
The turn-off to the minibus departure point is at hairpin bend 6/34, 1km south of Emerald village; it's 5km west. You can also hire a full jeep (₹2000) at the same spot. Ooty taxi drivers will take you to the checkpoint and back for ₹1600 (including waiting time).