Egmont Key from Anna Maria Island is a 11 mile loop trail located near Bradenton Beach, FL and is rated as difficult. The trail is primarily used for sea kayaking and is accessible year-round.
This is a great kayaking route but you have to be an expert paddler to accomplish it. The path from AMI to Egmont Key goes through Tampa Bay (by the SkyWay Bridge) which is the boating channel and has major rip currents. It take about 4+ hours, non-stop, one way. Its amazing on Egmont Key and well worth the sore muscles. Just make sure you know what you are doing and be safe. Check the weather forecast and be careful.