tvila lifnei shkiaa (שבתות ומועדים)

we are now in a tour in morroco and i need to have a mikve tonight erev shabat the only place that i can do it it is about 2 hours far from the place we having the shabat is it possible to get in the river befroe shkiaa 3 shaot lifnei shkiaa

כן, את יכולה לטבול בנהר, לפני השקיעה.