Things to bring to Costa Rica

Up-to-date Passport (and if US passport, good for 30 days after arrival)
EXTREMELY CASUAL…can be hot, cold, sunny and wet all in one day
Shorts for hiking and hanging out
T-Shirts, polo shirts, or hiking shirts
Pair of long pants or jeans for hikes
Bathing suits (good to have 2 because sometimes you need a 2nd before 1st is dry)
Water shoes with straps for rafting, zip-lining & rappelling
Flip-flops for shower or getting up at night.
Light jacket (gets cool in the evening)
Light rain gear – you will use it daily
Hats and sunglasses, bug spray
Sunscreen – sun is very intense, and then it rains!
Camera and camera cards
Toiletry items
Prescription meds (pack at least 2-day supply in carry-on)
Dramamine – your new best friend & mine, I like to keep the bus clean!
Large Ziploc or plastic trash bags for traveling from hotel to hotel with wet bathing suits or wet dirty shoes
Day pack / Back pack