The noun (Substantiv/Nomen) Höhepunkt is masculine in German. Therefore, the correct definite article in the nominative singular is der. So, you say: der Höhepunkt.
(highlight)
This word is composed and its gender is always determined by the root word.
Der wichtigste, aufregendste oder intensivste Teil von etwas; das Highlight; der Gipfel.
The most important, exciting, or intense part of something; the highlight; the peak; climax.
Der Höhepunkt des Konzerts war das Solo des Gitarristen. Der Höhepunkt des Berges war atemberaubend.
The highlight of the concert was the guitarist's solo. The summit of the mountain was breathtaking.
German grammatical gender can be tricky at first, as it doesn't always seem logical - like with the neuter 'das Mädchen' (the girl). But here's the good news: Even though you won't find a rule for every word and some things just need to be memorized, there are quite a few helpful patterns and rules! These are real guideposts and can make your life significantly easier. So it's definitely worth knowing them!
Nouns ending in -ant are usually masculine. Common in words of Latin/French origin, often describing people or technical/scientific terms
Nouns ending in -ast are usually masculine. Usually found in scientific or technical terms, often from Greek/Latin origins
Nouns ending in -ich are usually masculine. Common Germanic suffix, often in everyday vocabulary and adjective-derived nouns
Nouns ending in -ig are usually masculine. Germanic suffix forming nouns from adjectives or verbs, often describing containers or enclosed spaces
Nouns ending in -ling are usually masculine. Forms nouns describing people or things with certain characteristics, often with diminutive or derogatory meaning
Nouns ending in -or are usually masculine. Latin origin, typically describing machines, devices, or professional roles
Nouns ending in -us are usually masculine. Latin/Greek origin, common in scientific, academic, and cultural terms
Strong Verb Nouns: Derived from strong verbs, describing the action itself or its result are usually masculine. Very reliable rule in German
Examples:
Cars: Car brands and models are generally masculine in German
Examples:
Currency: Most currency names are masculine, except for a few notable exceptions
Days, Months, and Seasons: These temporal nouns are consistently masculine
Male Persons: Nouns referring to male individuals are masculine
Examples:
Mountains and Mountain Ranges: Most mountain names are masculine, except for specific ranges
Non-German Rivers: Rivers outside German-speaking countries are typically masculine
Nouns ending in -gang are usually masculine. Typically describing paths or processes
Examples:
Nouns ending in -mut are usually masculine. Typically describing states or qualities
Examples: