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Breathtaking, intricate, mysterious and massive. Most caves could be part of a fairy tale world or a mystery movie.The different types are limestone caves, lava caves, sea cave and ice caves. When is the best time to visit a cave?

Mammoth Cave National Park is a truly amazing year-round destination. However, in peak seasons (late spring until early fall) the cave draws big crowds, even more in the busy summer months. Each year, about 2 million visitors come to the park, with almost half a million of them taking a cave tour. Read our seasonal cave tour breakdown (shoulder season, high season, low season) and take a look at our tips to avoid the crowded tours in peak season. Please note that there are different tour schedules available for each season and that the number of participants allowed for each tour varies (up to 120).

March - May | Spring (Crowded Tours): Early March is often still a good time crowd-wise. From mid-March until May the tours get more crowded, even worse on weekends and public holidays (Memorial Day). Making online reservations is recommended. To ensure a slot for your desired tour, we suggest booking 1-2 weeks in advance, although for many tours it's sometimes possible to make reservations 1-3 days in advance only.

June - August | Summer (Very Crowded Tours): During peak summer months, the cave tours are heavily jammed. However, especially in June it's possible to get into a less crowded tour if you book an early morning spot on a weekday (Mon-Tue). Either way, making reservations is strongly recommended and often required to get into your desired tour. For the rare tours with very few participants, like the Wild Cave Tour, we highly recommend booking 3-4 weeks in advance, as it sells out real quick. Summer 2017 Schedule May 29 - August 19

September - October | Fall (Crowded Tours): After Labor Day weekend (early September) the crowds at the park thin out slightly at least, and not every tour is sold out in advance. However, it's still not quiet at all and making online reservations is recommended even during shoulder season. Fall 2017 Schedule August 20 - October 28

November - February | Winter (Uncrowded Tours / Quiet Time): November and December are much quieter months. In January and February, it's even possible, that you may get a mid-week tour nearly all to yourself. 'Walking along Broadway without anyone else is a surreal and otherworldly experience.' Winter 2017/18 Schedule

Avoiding Tourist Crowds

Since the cave temperature is at a constant 54 °F (12 °C) year-round, just visit in the off-season in winter (see above) or at least during shoulder months, in late fall or early spring. In the summer, the whole place is jammed with tourists, particularly between 10 a.m. and 2. p.m.

However, if you can only visit during the busy months, follow our tips to dodge the crowded tours:

Book the Earliest Tour Spot:
Use the NPS online reservation (click on the current schedule) and book the earliest tour spot before the buses arrive: 8:30 a.m., 8:45 a.m., 9:15 a.m. (depending on the tour). Book a few weeks ahead of time to make sure the slot is available. Additionally try to go mid-week (Mon-Tue) and not on the weekends. Even those early tours can still be crowded (full) at times but the whole park is quieter in the morning without the masses of tourists arriving via buses.

Book a Tour with Fewer Participants:
The number of people allowed on a cave tour varies by tour. The 'Domes and Dripstones Tour' for example allows 118 participants, which results in quite a crowd when fully booked. The Frozen Niagara Tour allows 'only' 39 people. Combine this one with an early morning time slot (see above)! However, the best tour to avoid the crowds is the Wild Cave Tour: An intense and very strenuous 6 hour drive for spelunking enthusiasts. Up to 14 participants only.

Special Parking Tip:
If you happen to arrive when everything is busy, do not use the parking lot in front of the Visitors Center. It's ridiculously crowded. Just park in the overflow parking at the Lodge (turn right before the Visitor Center). Walk through the Lodge and cross the bridge that takes you to the Center.

Weather | Year Round (Cave Temperature)

The cave has a constant temperature of 54 °F (12 °C) throughout the year, regardless of the outside weather. However, winter temperatures can be below freezing at entrances. In most areas of the cave, you'll be comfortable if you wear long pants and take a sweater or jacket with you.


US United States

With over 1 million visitors each year, the amazing Postojna Caves are Slovenia’s most popular tourist attraction. Read our detailed tips about the best time to visit and how to avoid the crowds:

Avoiding Tourist Crowds

The tours are equally crowded throughout the year. The reason for this is the fact, that fewer tours being offered in offseason. Check the Postojna Caves Timetable. This usually results in the same long waiting lines at the ticket counter and equally large groups in the cave (up to 100 visitors per tour guide) regardless of the season. However, the months of late June until August are by far the most crowded ones. To enjoy a more pleasant and hassle free visit at any time, follow our tips:

Book Online:
It’s much better to buy your tickets online in advance: Online Tickets. Then you can skip the long waiting line at the ticket counter in the cave park. You still have to convert your ticket into a scannable barcode. However, there is a separate counter (Group/Online) for that with almost no people in the line. It saves you between 30 - 50 minutes of waiting in the standard ticket line. This also applies if you bought the ticket in advance at other places.

Book an Early Spot:
Book the first spot available at 9:00 AM (10:00 AM in the off-season). It’s much less busy at the entrance and in general. Later all the large tour buses arrive throughout the day. Additionally, the chances are at least slightly higher that you can join a smaller group in the cave with less than 100 visitors. (The English language groups are always the largest. Join another language group if you speak one of the other languages)

Arrive 30 Minutes Earlier:
If you bought tickets for the 9:00 AM slot, be at the Cave Park around 8:30. It takes up to 10 minutes to walk from the car park to the gates. You’ll also have time to use the restrooms and be the first in line for the electric train.You have to be there 10 minutes before your tour starts anyway

Another great option to getting away from the crowds are the Adventure Tours. These are always done in small groups (3-10 or 11-20). The price for the easiest tour is only 40 EUR, compared to 26 EUR for the regular visitor tour. Read more details about these tours in the description section below.


Regardless of the outside climate, the cave has a constant temperature of 8-10°C (46-50°F) throughout the year. However, you are probably planning more activities besides the cave. If you prefer pleasant temperatures visit between May and September (you might want to avoid the extreme tourist months of July and August for your Slovenia visit). Weather details (you can switch between °C and °F at the top): Postojna Weather Averages

SI Slovenia

Summer months and dry weather are the best conditions to get about 150 meters deep inside of the cave. Not accessible in winter and after heavy rainfall.

All caves shouldn't be entered from October to mid-April. The caves are home for protected bats in the cold season.

DE Germany

The cave is closed from October until the end of March to protect the bats. It is advisable to visit the cave with dry weather conditions.

The cave is open from April to October.

DE Germany

The cave is open daily from late April to late October at 9.20 a.m. and closing at 3.30 p.m. in 2017 from 29.04. until 10. June and 11.9. until 29.10. In summer from 11.06 until 10.9. the cave is open until 4 p.m.

The cave is located on 1.455-meter above sea level. Therefore, you are dependent on the cable car operating hours from Obertraun on 609-meter above sea level to Schönbergalm section I. The season for the cable car starts end of April and last until late October. The last mountain ascent is at 3 p.m. and in summer at 3.30 p.m. The last valley descent is shortly after 5 p.m. At poor weather conditions, the cable car might not run. 
Check the opening hours first

A cave visit is a great option if the weather turns bad but expect more visitors having the same idea. It’s less crowded during nice weather when people think of outdoor activities.

Special events:
Every year in August unique concerts are held in the Parsifal Dome.
Schedule about the offered concerts and booking. 

AT Austria

The secluded beach behind the remarkable cave tunnel is only accessible sharp at low tide.
Tide times Port Arthur

Tasman National Park and also the Remarkable Cave are very popular. It’s a very short trail, easy accessible therefore can be a bit crowded. Best visited early morning or evening at low tide. In summer, even tour buses arrive. Limited parking places. The 3 hours hike of about 9 km to Mount Brown starts here and also the half an hour hike to the Maingon Blowhole.

AU Australia