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Dartmouth College via AP, Christos Mousas
This Jan. 16, 2016 photo provided by Dartmouth College shows fabricated holds mounted on a climbing wall in Hanover, N.H. The hold, created by using three-dimensional geometry, is part of a replica of a rock wall created by tracking a climber's hand and foot positions and by estimating the contact forces.

HANOVER, N.H. — Researchers have come up with a system that recreates difficult stretches of mountain climbs so they can be practiced at indoor climbing gyms.

A team lead by a Dartmouth associate professor has used 3-D modeling and digital fabrication to recreate stretches of routes in New Hampshire and Utah.

The team is hoping to eventually commercialize the system so that it could be used to replicate many more routes.

Researcher Emily Whiting says the recreation helps climbers master routes they maybe can't access in person.

Some climbers who have tried the new system say their outdoor ascents matched their experiences indoors.

But some climbers say nothing replicates the real thing.