From Espot you need to take a taxi service (which leaves every few minutes
in the mornings) till the park. The more money you'll pay the taxi
will take you deeper into the park. There are many walking paths through
the park with various difficulty levels. The taxi will take you to
the location you choose and leave you there.
It is up to you to get back, by foot, to the pick up station at the
base of the mountain, where a taxi will be waiting to take you back
to Espot.