If you're not well acclimated and plan to visit Rainbow Mountain, you have the option to rent a horse, which can be arranged directly with the local inhabitants. The cost for a round-trip ride is S/ 90.00 (USD 25.00). If you prefer, you can rent the horse for just the ascent or the descent at half the price. Additionally, you can rent the horse for specific sections of the trail for approximately S/ 40.00 or S/ 20.00, depending on the distance.
It's important to note that the horse does not reach the summit of Rainbow Mountain; you will be dropped off about 10 meters from the viewpoint, and you'll need to walk the final stretch on foot.