"Moderate: This type of person hikes on a more regular basis. This type of person may also partake in more frequent types of exercise in other aspects of their life. Hikes can last for half a day and have elevation gains of a few thousand feet. A moderate hiker will be able to hike at a faster pace and be able to handle longer inclines without feeling exhausted. At this stage, a moderate hiker has also started venturing out into hikes with different weather conditions that require more planning.
I would not regard this level as "experienced" in hiking, but rather, a moderate level of athletic fitness.
"Experienced", in my book, involves a whole long menu list of skills and history, including the following. I've labeled with B those skills that a beginner should work at acquiring. M would be expected of a "moderate" hiker. A=Advanced
Note: a lot of these skills are about attitude. Being in awe of nature, respecting others, making sure you don't create a catastrophe that might endanger someone else (e.g. SAR)
-keeping in mind you could be seriously compromised even 1/4 mile up the trail (it happens all the time, and woe betide you aren't prepared) (B)
-significant trail miles with "old timers" who know the ropes; you learn mistakes and protocols from them; you learn what might possibly happen, versus what your limited knowledge projects might happen. Note: "old timers" doesn't mean twenty-somethings. Try 40+; go with your local hiking club, national club, meetup, an organized group with a leader, so you learn whys and wherefores (this does NOT mean a guide on Kilimanjaro) from the leader and other hikers (B)
-knowing, carrying, and using the "10 essentials" (B)
-wearing a pack that has supplies and spare items (e.g. extra socks and raingear) that are appropriate for most hikes so you can address unanticipated changes in conditions
-the demonstrated ability—in the field—to use paper map and manual compass. (M)
-knowing how to filter water (you can practice in the sink at home) (M)
-knowing one's limits, in terms of mileage and time; managing your time, so you are back at the trailhead before dark (B)
-observing Ranger notices and following through (these are frequently safety-oriented, but may be fire banning, or limit to party size, etc.) (B)
-having appropriate gear, especially hiking boots with lugged soles (some National Parks even require these to go on Ranger hikes), and understanding why they are needed (B)
-carrying enough food for the trip, plus an extra sandwich or energy bar; this acknowledges conditions might keep you later than planned (B)
-planning your water supply (B)
-getting the forecast and integrating it into your plan (B)
-observing "leave no trace" practices TO THE LETTER; to get this right, you have to understand and abide by (from every ounce of your being) the notion that everyone and everything deserves a pristine trail. "Experienced" folks will often carry out other people's trash, even if it's micro-trash, just because the trail and its surroundings are for everyone, creatures and people. This takes commitment and selflessness. (B)
-the Red Cross certificate in wilderness first aid is a good idea (I used mine the first hike after I got it). (A)
-and yes, to be "experienced" you would have had to manage some obstacles or "surprises" in your history (M)
-above all, having respect for nature; hubris is the very opposite of "experience". (B)
-I almost forgot. How to poop in the wilderness is an art and a skill. It keeps everyone and everything as safe as possible, nature unmarred by your presence. How to pee, an art and a skill for women. Especially without taking your pack off. (B, M, A!)
It takes miles of hiking in steep, less steep, rugged, and basic, to get this kind of experience, but just because you walked a bunch of miles doesn't make you "experienced". That's merely "fit".
IME most backcountry folks who are "experienced" (as in, VERY advanced) don't actually refer to themselves that way. This is why I rarely go along with a friend or relative labeling a missing hiker "experienced".