No, I doubt we will even manage to go back to the moon before then. I don't think it is unrealistic that mankind will one day be able to colonize Mars, but I think this will only be achievable over a time frame of half centuries, not decades, and the world is not currently focused or committed enough.
We have regressed into the childishness of squabbling over how many genders there are and why anyone who wants to can't just waltz over the border into whichever country has the best welfare, instead of doing something about their own damned country. Hard science is considered evil if it doesn't fit in with politically correct opinion, or a matter of post-modernist opinion, and our brightest are more likely to end up being brainwashed by gender studies courses and coming up with their own pronouns than knuckling down into challenging STEM fields.
Anyway, there won't be the required level of financial resources allocated to this in any country capable of such a mission - the money either all goes to the bottomless social welfare pit, or the bottomless global military pit. The global tide of post modernism, cultural Marxism, the obsession with political correctness and "diversity" needs to run it's course (if it ever does) before we have any hope of taking another giant leap for mankind.
We have landed an unmanned vehicle on Mars. Travel time is only around 300 days, we have had people in space for longer. All the technology is there, it's more about funding and finding someone bold enough to attempt it. Musk is such a person. Now it's just about funding. Not like we as the human race can't afford it...
I highly doubt we'll be able to colonize Mars, but having a human set foot on it, very possible.