Hey @Jpacillo! Welcome to CO. I’m 17 years in now, but I remember when I first arrived in Boulder- there were/are a dizzying number of trail selections. It would help to know what part of CO you are in or where you are seeking to hike. One suggestion is Guanella Pass- especially beautiful this time of year. The Mt. Bierstadt trail is easy and you can go out as far as you like- it does start at high elevation, but not a huge amount of gain unless you want to tackle the summit (it’s one of the easiest 14ers with only ~2800 ft in elevation gain. As someone else suggested, the Red Rocks loop is easy, with the distance you mentioned. NCAR in Boulder has a number of great trail options right off the parking lot. Chautauqua also has some good trails in the 3-4 mile range. I can’t speak for other areas of CO, but in Boulder there is a New in Town hiking Meet Up group, so that might be a good option. Happy trails!
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