A main road in Ta’'s Tha Song Yang district was blocked by soil and trees that down from mountains due to flash floods on Wednesday morning.
A tourist-destination cave also had to be closed, authorities said.
Prasong Lar-on, the Tha Song Yang district chief, directed workers from the Tak Highway office, district officials and volunteers using heavy equipment to clear the blocked Mae Sot-Mae Sariang road.
The landslides followed days of heavy rain.
At the kilometre marker No 184 of the road in Ban Mae Ngao village near the Mae Hong Son boundary, some large rocks slid down the mountain, leaving only one lane for vehicles to pass.
Officials closed the Mae Usu Cave after its entrance was flooded by mountain run-off.