Secret, hidden lakes in colorado with good fishing and perfect for backpacking?

every year my family goes backpacking in colorado. we've been doing it for around 20 years. we usually spend one day just hiking up to our destination lake and then stay the night there for 6-7 days. so when i say backpacking i truely mean it. im not talking about set up a tent outside of a camper or car. if anyone knows of any that ive described that would be great. thanks