Whitney (4400 m).

Rivers and Lakes:

Rivers entering the Atlantic - they are short, not very deep and not very important for economy. These are like Hudson, Potomac, Delaware, and Susquehanna. Hudson is only navigable river. The main river entering into Mexico Gulf is Mississippi. With many important tributaries like Missouri, Arkansas, Ohio, Kansas River.
Mississippi is the biggest and the longest river.
Rio Grande flows through the american-mexician border. In western part the well-known rivers are: Columbia, Sacramento, Colorado with its famous Colorado Canyon.
The greatest and the largest lakes are Great Lakes: Ontario, Erie, Huron, Michigan, and Superior.
Natural Resources:
The U.S. is rich in mineral resources, especially oil, zinc, copper, lead, silver and gold, aluminium, coal and iron.
Climate:
The U.S. as a whole has a good conditions. This block of 48 states is temperate zone. Extreme south has subtropical climate. The Atlantic coast is relatively cold with heavy snowfalls in winter. Summers are hot and very humid. The Middle West einters are colder and longer while summers are hot and dry. The gulf coast has mild climate with good rainfall. This western mountainous part has long and cold winters with heavy snowfalls. Summers are very hot. There are some deserts and very dry plateans in Arizona, Nevada and New Mexico. The Pacific coast has a milder climate then the Atlantic one, owing to mild winds flowing from the Pacific.