Travel to all the territories of the USA. Take trips to the 5 inhabited American territories of Puerto Rico, the U.S. Virgin Islands, Guam, the Mariana Islands, and American Samoa. https://travelgoalgetter.com/travel-blog/youve-been-to-all-50-states-now-what-the-us-territories-are-calling
Visit every COUNTY in the USA. The Extra Miler Club is for travellers who count the counties that they visit. Quite an impressive feat! Only 67 travellers are known to have completed this - visiting 3,143 counties, parishes, territories. https://www.extramilerclub.org/
Visit the biggest cities in the USA. 80 cities with a population of over 250,000. Thank you to 50 stater Gregg Schmidt for inspiring this challenge. https://travelgoalgetter.com/travel-blog/big-city-usa-checklist
Hike the highest point in every state. The Highpointers Club is a great resource for those wanting to reach the summit in every state. https://highpointers.org/
Go to a national park site in every state. The National Park Travellers Club (NPTC) has tools to keep you motivated. Collect park stamps! https://www.parkstamps.org/
Visit all 7 continents. A sister club of the All Fifty States Club, that challenges travellers to visit all 7 continents of the world. North America, South America, Europe, Asia, Africa, Australia, Antarctica. https://travelgoalgetter.com/continent-club.html
Enter each state via a different border. All 50 stater Bob Rainville came up with this fun challenge. See states from a different vantage point! https://travelgoalgetter.com/travel-blog/border-crossing-challenge
Count country visits. A sister club of the All Fifty States Club that challenges travellers to count up the countries they visit. Bronze Level membership, 15 countries visited, Silver, 30 countries, Gold, 50 countries, and Platinum, 100 countries. https://travelgoalgetter.com/travelers-country-club.html
Visit 100+ countries. The Traveller's Century Club sets the bar high as you can only join once you have visited 100 countries and motivates travellers to visit every country in the world. https://travelerscenturyclub.org/about
Go North and travel to all 13 Canadian provinces and territories. You may have gone to 2 or 3 already if you drove to Alaska as part of your 50-state journey!
Ride in or to all 50 on a motorcycle. The Iron Butt Association recognizes long-distance motorcycle riding including going to all 50 states. * requires documentation of visits to each state