This Award is meant for Boy Scouts.

The High Adventure Triple Crown award is available to scouts and scouters. There is no time limit on earning the award. Some participation requirements can be completed as a youth and the rest as an adult. To receive the High Adventure Triple Crown award, you must complete any high adventure program at all three BSA national High Adventure bases - Philmont, Northern Tier, and Sea Base. These can be summer or winter programs. For example, either summer Canoeing or winter Okpik programs at Northern Tier qualify.

The basic rule is that if you receive a participant emblem/patch from the
High Adventure base during your program, it qualifies as your participation
requirement for that BSA high adventure base. Programs hosted by the
three bases and their satellites that do not qualify for earning a BSA high
adventure participant award do not qualify as meeting the Triple Crown
requirement. Examples include attending training such as Wood Badge or
similar programs are not qualified.

You will need to supply the program, crew number, dates, and staff member name for each of your three high adventure treks. A useful information page is online.

Use the Triple Crown Award application to get your award patch.