Quick answer: Choose Hverfjall for the crater panorama only when wind, footing and daylight support the climb. Choose Dimmuborgir when you need a lava walk with a clean turn-back point. Neither charges admission; the real budget is driving, daylight and energy before the next fixed plan.
ICENAVI FREE ATTRACTION FIT · MÝVATN
The free stop still costs legs and daylight
Scored for walking, wind exposure and time efficiency.
The crater rim gives you a complete panorama, but the climb and exposed wind increase the physical cost.
Short and long loops can be swapped easily; the dense lava pillars and caves make it simple to turn back.
They are not far apart, but a lava loop after a sustained climb can squeeze the time available for a geothermal bath.
HverfjallCrater climbDimmuborgirShort lava loopReykjahlíðSupplies / accommodationEarth LagoonGeothermal finish
Choose the view before you choose the stop
| Situation | Better fit | What you get | What it costs |
|---|---|---|---|
| Only 90–120 minutes left | Dimmuborgir | Lava pillars on a short loop | No panorama over Mývatn |
| Clear weather and good energy | Hverfjall | Crater and lake-area panorama | Climb, wind and loose gravel |
| Travelling with children or older adults | Dimmuborgir short loop | Easy to turn back at any point | Uneven ground on some sections |
| Earth Lagoon later in the afternoon | Hverfjall first, then decide based on energy | Put the harder effort in the longer daylight window | The lava loop may need to go |
Put the exposed climb before the sheltered lava walk
From Reykjahlíð, go to Hverfjall while your legs are fresh, continue to Dimmuborgir, and leave Earth Lagoon as the optional finish. If the wind rises, drop the crater and keep the shorter lava loop. Starting at Dimmuborgir can feel easier, but you may reach the crater with less daylight and less patience than the map suggested.
For a fuller day around Mývatn, start with the Mývatn attractions overview. If you have a snowmobile meeting that day, treat the meeting and changing time as fixed entries; free attractions are not empty spaces you can insert anywhere.
How wind, snow and mud change the choice
Hverfjall’s open terrain makes the wind feel more direct, and uphill progress slows noticeably in winter or during the thaw. Dimmuborgir’s lava pillars offer more shelter, although the ground may still be icy. Check the Mývatn rain-and-wind backup plan before setting out, and decide in advance which route you can shorten. A free attraction gives you room to change plans on the spot, provided you have not locked in the next geothermal-bath time too tightly.
Budget fuel and daylight, not admission
Neither attraction charges an admission fee; keep your budget for the rental car, fuel and the geothermal bath afterwards. If you are detouring for one free attraction, fuel per kilometre and extra driving time show the real cost more clearly than an admission price. For two people driving themselves, set aside HK$150–300 per person/NT$600–1,200 for extra fuel and parking around the Mývatn circuit, then adjust it for the vehicle and route distance.
If you are already staying two nights around Mývatn, comparing Hverfjall and Dimmuborgir on the same day makes sense. With only one afternoon, choose the attraction you can finish before the next fixed activity. Use snowmobiling and Earth Lagoon as a check for possible timing conflicts.
Hverfjall offers the larger scenic payoff; Dimmuborgir is more flexible. Choose around your energy and the next time slot, rather than treating both free attractions as compulsory stops.
Put parking, the climb and the next stop on one time budget
From Reykjahlíð, reach the Hverfjall parking area first, then move on to Dimmuborgir, and continue towards Earth Lagoon or your accommodation. The attractions may look only one drive apart, but finding a space, putting on an extra layer, negotiating loose ground and returning to the car for water all take small amounts of time. If the geothermal bath is booked for the afternoon, Hverfjall has to happen first; any spell of wind or snow at the crater can eat straight into your entry time.
| Task | Hverfjall | Dimmuborgir | Minimum time to allow |
|---|---|---|---|
| Parking and getting ready | Sort your gear before the climb | Walking starts at the entrance | 15–20 minutes |
| Main walk | Climb, crater rim and return | Short or long lava-pillar loop | 90–150 minutes |
| How to shorten it | Skip a full circuit of the crater | Take the short loop and turn back | Keep 30–45 minutes |
Three travellers, three sensible answers
If this is your first visit to Mývatn, the weather is clear and you have one natural highlight to choose, Hverfjall gives the stronger panorama. With older adults, children or a long drive already behind you, Dimmuborgir’s short loop is easier to control. Photographers do not automatically need the higher crater: the lava pillars have more depth in low-angle light, and the time there is easier to adjust. The difference is not a ranking; it is about choosing the kind of effort that fits the same afternoon.
When winter daylight is short, check the wind and trail surface first. Hverfjall is exposed, so a rise in wind can make it difficult to linger on the rim; Dimmuborgir has more lava shelter, but ice can still slow the short loop. If you have a snowmobile meeting booked, the free attraction has to fit before or after it without using up the check-in buffer.
A second free stop still spends the afternoon
No admission fee does not mean no cost. Every extra stop around the Mývatn circuit means slowing down, finding a space, getting out and navigating again. For two people driving themselves, you can initially reserve HK$150–300 per person/NT$600–1,200 for extra fuel and parking, then revise it for the vehicle, roads and any detour. If the extra drive is only there to increase your attraction count, the time usually changes your day faster than an admission fee would.
A free attraction’s real price is the extra drive
How Hverir and Earth Lagoon change the choice
After Hverfjall, continue to Dimmuborgir, then choose Skútustaðagígar or the geothermal area according to your energy. After Dimmuborgir, going on to Hverir means adding mud, wind and the time needed to move and park again. For a more workable Mývatn day, read the Mývatn attractions overview, then use snowmobiling and Earth Lagoon in one day to check the fixed meeting time.
The choice is straightforward: choose Hverfjall for a crater panorama, Dimmuborgir for a lava walk you can end at any point, and both only when you have left real buffer before the bath and the next drive.
Arrival time changes the character of the stop
Arriving in the morning usually gives Hverfjall better light and visibility for a full circuit; arriving in the afternoon makes Dimmuborgir’s short loop easier to control, while leaving time to return to your accommodation for dinner. If you are driving into Mývatn after whale-watching in Húsavík, check your return-to-port time and do not treat both free attractions as compensation for a delayed boat. Missing one attraction will not remove the north’s main thread; missing the next booked activity is what changes the day.
Photographers can place Hverfjall earlier to reduce the chance of low cloud hiding the lake area. If you want an easy walk after an activity, Dimmuborgir is easier to finish by the minute. Before leaving, deal with muddy soles, extra layers and drinking water so the next bath or hotel stop is not slowed by small practical tasks.
Free stops work best as a pressure valve in the Mývatn day. Write down the next fixed activity before you leave, then use the weather and your energy to choose the walk that still fits.
Missing one crater or lava loop will not undo the northbound route. Arriving late for the booked bath, boat or hotel check-in is the more expensive mistake.
Related reading
In winter, confirm that the crater entrance is reachable before you set out
Start with the wider Mývatn route
Mývatn attractions overview · Mývatn rain-and-wind backup plan
Q&A | Hverfjall and Dimmuborgir
Can both attractions be completed on the same day?
Yes, but do Hverfjall first and then take Dimmuborgir’s short loop according to your energy; leave buffer before the next fixed bath or activity.
Which should I choose in winter?
In strong wind or snow, choose the Dimmuborgir route that you can shorten; add Hverfjall only when roads and trails are stable and daylight is sufficient.
Do I need a reservation?
The attractions themselves do not require an admission reservation; handle parking, the geothermal bath and paid activities according to the relevant page for that day.