A 77.4 Year XI in India is roughly a 3.75, not a US 77 (=C+ in the US-> community college) or a US 3.1 (B=> 4 year universitywith 70+% acceptance), unless that 77 is a combination of all years.
“Child scientist” means nothing in US terms, do you mean Young Scientist of the Year or something of the kind?
The description of your activities doesn’t allow us to gauge the extent of your involvement, whether you were part of a team, school based or hosted at a university, where the funding came from, if it was for a class or a national contest.
If you won marathon races what was your time and did you reach out to the Track and field coach at the universities you’re considering and would they support your application? ( do that ASAP)
I agree your list is over reaching though.
Definitely include Lawrence and St Olaf, both good for the sciences (Lawrence is especially strong in Physics). Perhaps add Penn state, Iowa State, Ohio State.
What’s your budget? Are you full pay?