at the peak of + activity/period
Describing the highest stage
Use at the peak of to describe the highest point of success, growth, or activity.
The athlete was at the peak of his career.
Which prepositions go with “peak”?
Peak combines with different prepositions depending on whether you mean time, level, or conditions.
Quick answer
Common combinations with “peak”
Use at peak or at the peak for the highest point, peak of for the highest part or period, and during peak hours for a time period. In peak and with peak are limited to special contexts.
Sales reached their peak at noon.
Traffic is heavy during peak hours.
She was at the peak of her career.
Traffic is heavy during peak hours.
She was at the peak of her career.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
peak of + noun
Naming the highest point or strongest moment
Use peak of before a period, mountain, or level.
We visited during the peak of summer tourism.
during peak + time
Talking about busy periods
Use during peak hours or during peak season for crowded or busy times.
Trains are full during peak hours.
in peak condition/form
Describing an excellent state
In peak is natural in fixed expressions such as in peak condition or in peak form.
The team arrived in peak condition.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
during peak
Prices rise during peak season.
within a busy or high-demand period
peak of
The city saw the peak of infections in January.
the highest point of something
at peak
Electricity demand is at peak levels.
at the highest level
in peak
She is in peak form.
used in fixed expressions about condition or performance
with peak
The road struggles with peak traffic each morning.
with introduces a separate condition, not a fixed combination with peak
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using “in peak” too generally
In peak is mainly used in fixed phrases such as in peak condition.
✕ We traveled in peak. ✓ We traveled during peak season.Confusing “peak of” and “at the peak of”
Peak of names the highest point itself, while at the peak of describes being at that stage.
✕ She was peak of her career. ✓ She was at the peak of her career.Treating “with peak” as a standard pattern
With usually introduces a separate condition, not a direct collocation.
✕ Stores are busy with peak. ✓ Stores are busy during peak hours.Quick practice
Choose the expression that matches the intended meaning.
1. Traffic is worst ___ peak hours.
2. She was at the ___ of her popularity.
3. The runners were in ___ condition.
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Frequently asked questions
Is “during peak” correct?
Yes, especially in phrases like during peak hours or during peak season.
Can I say “at peak”?
Yes. It is common with levels or performance, such as at peak demand.
Is “with peak” a fixed expression?
No. With usually introduces a separate idea, such as with peak traffic levels.
Related preposition guides
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