Biking up the mountain is a noteworthy achievement.
noteworthy /ˈnoʊtˌwɚði/ adjective
[more noteworthy; most noteworthy]
: important or interesting enough to be noticed : deserving attention: NOTABLE
He gave several noteworthy performances during his short career.
Nothing noteworthy happened that evening.
Her art is noteworthy for its great quality and beauty.
a noteworthy feat/achievement