Participants must weigh between 80 and 260 pounds to ensure proper wetsuit fit. You should also be reasonably physically fit as the tour is rated most strenuous. (If you can’t find it difficult to walk one mile, then this tour may not be for you.) We snorkel from a rocky beach and current are almost always present, so the tour is not suitable for the elderly or guests with limited mobility. Our suggested age limit is 65 depending on your level of physical fitness. Due to the strenuous nature of snorkeling in Alaska and in accordance with the guidelines established by The Professional Association of Diving Instructors (PADI) Discover Snorkeling Program, we must deny participation for a variety of medical conditions. If you suffer from ANY form of heart condition past or present, minor or major, we are unfortunately unable to take you snorkeling. Heart conditions include but are not limited to murmurs, flutters, mitral-valve prolapse, angina, stints, pacemakers, defibrillators, bradycardia, tachycardia, congestive heart failure, valve replacement, bypass surgery, etc.   We also must deny participation for major respiratory disorders like bronchitis, emphysema, COPD, exercise-induced asthma, etc. Lastly, if you have any past or present history of seizures or fainting, we are unable to take you snorkeling. Please accept our sincerest apologies if you have any of the above medical conditions. Your safety is always our number one priority.