The most popular months to paddle the Allagash River are June, July and August. Think about what is most important to you when planning your trip. Ice out is in early or mid May. Late May into mid June will have the best brook trout fishing and excellent water levels, but you will need to be prepared for biting insects and cold water temperatures. Air and water temperatures warm dramatically in July and August for comfortable camping and swimming conditions. Biting insects will begin to taper off. Water levels can get low in some sections in August. Autumn is a beautiful time to paddle the river amid the fall colors. You can expect warm days and cool nights and the biting insects disappear.