Because we only had four full adventure days, we stayed on the southern coast, driving as far as Vik - about five hours from the airport. We could have spent three days in Vik alone and not run out of things to do. The town is classy and cool in a way that settles into you slowly.
On one single day we walked on a glacier, went into ice caves, watched a live lava demonstration, learned more about volcanoes than I expected to absorb, and sat on a black sand beach running from waves that had no interest in being friendly while puffins flew in overhead to settle for the night. If you know me at all you already know the beach was my favorite. But all of these adventures were new to us. I think the entire trip will be a core memory.
We stopped at two waterfalls. The first you can actually walk behind - bring your wet weather gear for this and you will not regret it, bring nothing and you will be soaked and cold and watching from the sideline while everyone else is inside the waterfall. The second was larger, louder, more powerful - you couldn't walk behind it but you could stand close enough to feel it in your chest, and there were 500+ steps up to an overlook at the top. Not ADA accessible (just assume all the side quests aren't), very worth it if you're able.
Then there was the hot spring river hike. My daughter had one non-negotiable request for this trip. One. The reviews said easy, 40 minutes, running hot spring river. Done. We were going.
We pulled into the trailhead and looked up. Straight up. What we thought was the hike was a hill that was lying about being a hill - it was a small mountain with a zig-zag line of people working their way up the face of it. We could see what looked like a hot spring plume near the top and thought okay, one hour, we get there, we soak, we come back down. Fine.
The trail had other plans.
It took us up and over the mountain entirely. Behind it, actually - to the other side, where a massive waterfall gorge opened up below us that we did not see coming and could not have prepared ourselves to see. Past a herd of wild sheep who had absolutely no interest in us. Down the other side into a saddle between two hills, then up again. About a thousand feet of total elevation change. An hour and a half in, we finally arrived at the hot spring river.
My daughter got in like it was a bubble bath she had been promised her entire life. She relished in it. She was a completely different creature in that water than she had been on the trail - where, to her credit, she had been bouncing around like a mountain goat the entire way up while two underprepared adults in their forties trudged behind her with increasingly creative complaints and a shared 'are we ever going to get there' energy that we tried to keep below the audible threshold.
We had exactly 30 minutes in the water before we had to turn around to get the van back on time and make our shuttle to the Airbnb. All three of us were quietly devastated. Muscles soothed, spirits slightly broken by the math of it, we made our way back down in a kind of moody, tired silence that is its own kind of family bonding.
The way there was all anticipation - every turn felt like it might reveal the springs just around the next bend, and it never did, and our daughter's enthusiasm carried us further than our own bodies wanted to go. The way back was just the mountain, again, the shakiness of our legs, and the thought of just the few minutes we had spent in that luxurious river.
Would we have done the hike if we'd known what it actually was? Honestly, probably not. Standing at the trailhead looking up at what we thought was the full climb was intimidating enough. The real version would have sent us back to the van for snacks and a rethink. So am I glad we didn't know? Yeah. We unknowingly climbed a small mountain. The three of us. Together. And that is an unexpected win we've collected for our memory bank.
Next time we go - and there will be a next time - we're dedicating a full day to it. More water, more snacks, a pace that lets you stop and look around instead of just survive the incline. And we're staying in that hot spring until our muscles are mush and someone has to physically make us leave.
TIP: If you're planning this trek to the hot spring river: ignore any review that calls it easy or short. Budget most of the day, bring more water than you think you need, pack real snacks, and wear your hiking shoes not your hey dudes. You will not regret going. You will regret being underprepared.