The Best National Parks to Visit in April — Ranked by Data

• Acadia: In April you can still drive up Cadillac Mountain at Acadia without booking: the park service's vehicle reservations for Cadillac Summit Road start in late May (May 20 in 2026) and run to late October. Once the season starts, each car needs a $6 Recreation.gov reservation, bought online only, with 30 percent of slots released 90 days ahead and the rest two days before.
• Arches: April at Arches: plan around trailhead parking. The park service says the Delicate Arch and Devils Garden lots often fill for hours at a time, especially on weekends and holidays, and that vehicles may be turned away at the entrance when the park gets too congested.
• Badlands: Planning an April trip to Badlands? The park service says roads through the park may close during winter or extreme weather events, so check conditions first.
• Big Bend: April is the last month of Big Bend's main season, which the park service puts at October through April. Through April the Chisos Mountains Lodge and all developed campgrounds still fill every night, and any holiday weekend draws extra visitors, so book a campsite or room before you arrive rather than hoping for a spot.
• Biscayne: April ends Biscayne's busy season, which the park counts from late November through the end of April. Both campgrounds sit on islands reached only by boat, with no ferry, and neither takes reservations: sites are first come, first served.
• Bryce Canyon: April is when Bryce Canyon's season starts up. The park shuttle begins running in April, and Sunset Campground opens in mid-April, joining North Campground, which is open all year.
• Canyonlands: April opens Canyonlands' spring season, which the park service names, with mid-September to October, as the most popular and temperate time: daytime highs of 60 to 80°F and nights of 30 to 50°F. A single day can still span more than 40 degrees, so carry layers.
• Capitol Reef: April at Capitol Reef: the Gifford House Store and Museum in Fruita has been open since March 14 (Pi Day), daily from 9 a.m. to 4:30 p.m. until late November. The park and campgrounds are open year-round, though the park service notes that some roads can close for snow or bad weather, so call 435-425-3791 for the daily weather and road report.
• Carlsbad Caverns: April is when Carlsbad Caverns' bat season starts: the park service says hundreds of thousands of Brazilian free-tailed bats live in Carlsbad Cavern from April through October, and watching them stream out at dusk is a park tradition. Going into the cavern itself still needs a timed entry ticket; reserve your entry time ahead, then pay for the entrance ticket at the visitor center (open 9 a.m. to 5 p.m.).
• Channel Islands: April is nesting time. West Anacapa and Santa Barbara hold the only brown pelican breeding colonies in the western United States, and on Santa Barbara Island the nesting area is closed and trails shut while birds sit on eggs.
• Congaree: April falls in what the park calls one of the best times to visit Congaree: spring, March through May, when daily highs reach the mid to upper 70s°F and insects are generally not a problem. Showers are common, with about 3 inches of rain a month, and an occasional thunderstorm, so pack a light rain layer for the boardwalk and trails.
• Crater Lake: April is the end of the winter season at Crater Lake, and the park service says plowing typically starts on West Rim Drive in mid-April. There are no set reopening dates: in the park's own table of recent years, the North Entrance and West Rim Drive opened anywhere from May 14 (2015) to June 30 (2023), depending mostly on how much snow fell that winter.
• Cuyahoga Valley: April brings spring rain, new leaves and wildflowers to Cuyahoga Valley, the park says, with average days of 57°F, nights of 38°F and only about 2 inches of late snow. The Towpath Trail section from the Boston Trailhead to Lock 29 has a tentative closure until April 21, 2027 for repairs, so plan towpath walks around it early in the month.
• Denali: April at Denali is still the park's winter set-up. The park service says only the Winter Visitor Center and Riley Creek Campground are open in winter.
• Death Valley: April is the end of Death Valley's busy camping season: Furnace Creek Campground takes reservations only until April 15. For trip planning, the Furnace Creek Visitor Center is open daily 8 a.m. to 5 p.m.
• Everglades: April is the last month of Everglades' dry season, which the park service runs from November through April, with mild days, low humidity and clear skies. It is still one of the popular times to visit, with ranger-led programs at Royal Palm, Flamingo, Shark Valley and Gulf Coast.
• Glacier: April is when the plows go to work on Going-to-the-Sun Road. The park says spring snowstorms and avalanches often force crews to clear the same stretch twice, which is why it sets no opening date for the road over Logan Pass; the full road has usually opened by late June or early July.
• Glacier Bay: April opens the driest stretch of Glacier Bay's year: the park says April, May and June are usually the driest months. That is relative, since Bartlett Cove gets about 70 inches of precipitation a year, so good rain gear still matters.
• Great Basin: April is spring at Great Basin, when the park says rock squirrels wake and start foraging and snowmelt sends streams down the mountain. At Lehman Caves, days near 56°F give way to nights just below freezing, and the high country still holds snow; April's heaviest recorded snowfall at the visitor center is 35 inches.
• Grand Canyon: April is when Grand Canyon's winter usually starts to break, by mid-month, the park says. Rim highs climb into the 50s and 60s°F, while the river near Phantom Ranch is already in the 80s.
• Great Sand Dunes: April is when Great Sand Dunes' camping season starts: Piñon Flats Campground is open from April through October, and vehicle camping in the park becomes possible again after the November-to-March ban. The visitor center keeps its year-round hours, 9 a.m. to 4:30 p.m.
• Great Smoky Mountains: Stopping for a spring hike in the Smokies? At Great Smoky Mountains, any car parked for more than 15 minutes needs a parking tag; just driving through needs none.
• Grand Teton: April at Grand Teton is a slow thaw: days around 49°F, nights in the low 20s and roughly 10 inches of snow at Moose, the park's records show. Mild days and cool nights alternate with rain and snow from mid-April, and valley trails usually stay snow-covered until late May.
• Haleakalā: April is the first month after the summit's named rainy season ends, though the cabin guidance still says to plan for rain in every season. It is also when autumn crater stays come within reach: Hōlua, Kapalaoa and Palikū, the three historic cabins, can be booked on Recreation.gov as much as half a year before the stay, so an April booking session reaches October.
• Indiana Dunes: April 1 is when Indiana Dunes' Dunewood Campground opens for the season, which the park service runs until November 1. Most beaches and public areas are open daily from 6 a.m. to 11 p.m.; West Beach and Porter Beach close earlier, at 9 p.m., while Kemil Beach is open 24 hours.
• Joshua Tree: April camping at Joshua Tree needs a plan B. The park service lists spring as its busiest time, with first-come sites usually taken most weeknights until mid-May, and it recommends a reservation for any weekend, holiday or spring day.
• Kenai Fjords: April rarely opens Kenai Fjords to cars. The park service says the road to Exit Glacier is closed to automobiles while snow covers it, typically from sometime in October to May depending on the year, so check the current conditions page or the recorded line at 907-318-2088 before driving out of Seward.
• Kings Canyon: April is the end of winter at Kings Canyon's Grant Grove, with afternoons around 51°F and frosty nights. Cedar Grove, on the canyon floor between about 3,500 and 4,700 feet, is closed in winter because of frequent rockfalls on its road, and it typically reopens in May, depending on weather and conditions.
• Kobuk Valley: April 1 moves the Northwest Arctic Heritage Center in Kotzebue to summer hours, 9 a.m. to 5 p.m. on weekdays, sometimes Saturdays too. Staff help plan camping and float trips and lend bear-resistant food containers on request.
• Lake Clark: April is usually when the ice on Lake Clark melts, the park says, after a freeze that typically begins in November. That changeover matters, because ice conditions decide whether planes on floats or skis can land.
• Mesa Verde: April at Mesa Verde is before the main season: the park service says cliff dwelling tours begin in early May, and Wetherill Mesa is expected to reopen in late spring 2027. The museum has been closed for renovations since October 25, 2026, with reopening scheduled for late spring 2027.
• Mount Rainier: April brings Mount Rainier's spring, when the park says ephemeral waterfalls run and a quieter, more leisurely trip is possible, though weather may decide which facilities are open. Expect Paradise to top out in the mid-40s°F, and Ohanapecosh, low in the southeast corner, nearer 58°F.
• New River Gorge: April at New River Gorge is still early season. Canyon Rim and Sandstone visitor centers are open daily from 9 a.m. to 5 p.m., but the Thurmond Depot and Grandview visitor centers stay closed through May.
• Pinnacles: Plan an April weekend at Pinnacles around parking. The park service says it gets extremely high visitation on weekends, holidays and whenever the weather is good, with delays most likely between 10 a.m. and 3 p.m.
• Redwood: April 1 is the date the park service gives for reopening dispersed camping along Redwood Creek after the winter high-water closure, though it notes the date can shift if the creek runs high. Plan the Tall Trees Trail ahead: it takes a reservation all year.
• Rocky Mountain: April at Rocky Mountain is still before the season for Trail Ridge Road, which stays closed to through travel until late May. Temporary raptor closures can be in place around nest sites of falcons, hawks and eagles; peregrines can dive at over 200 mph and may strike people near a nest.
• Saguaro: Late April is when saguaros start flowering. The park service says the tops of the trunks and arms sprout large, creamy white flowers from late April through early June; each opens at night and closes the next afternoon, and is pollinated by nectar-feeding bats, birds and insects.
• Sequoia: April begins spring in Sequoia, a season the park service says lasts until about mid-June depending on elevation. The sequoia groves are often still snowy, late storms are common and chains may still be required, so check the forecast before driving up.
• Shenandoah: April is when Shenandoah opens up for the year. On the park's 2026 schedule, Big Meadows Campground (reservations only) and Big Meadows Wayside opened in late March, Skyland on March 30, and Lewis Mountain's cabins on April 10.
• Voyageurs: April at Voyageurs sits between seasons. The park's lakes can stay ice-covered until mid-May, though ice-out dates vary a great deal from year to year, so check the latest conditions before planning on either open water or travel across the ice.
• White Sands: April at White Sands averages 79°F by day and 40°F at night, with very little rain. Sunny days with strong windstorms are common in spring, the park says.
• Wind Cave: April falls in the stretch, March through October, when the park says Wind Cave's tours often sell out, so book the Garden of Eden, Natural Entrance or Fairgrounds tours on Recreation.gov, from 120 days up to two days ahead. About half of each day's tickets are kept for same-day sale at the visitor center.
• Yellowstone: April is when Yellowstone's roads start reopening to cars. The park service projects the western loop (West Entrance to Madison, Madison to Old Faithful and Norris, Mammoth to Norris, Norris to Canyon Village) to open on April 16 in 2027, while the East, South and Dunraven Pass roads stay closed into May.
• Yosemite: April 15 is when the park begins plowing updates for Tioga Road and Glacier Point Road, which usually reopen in late May or early June. Mariposa Grove Road and its shuttle reopen no earlier than April 15, typically sometime in April; until then the two-mile Washburn Trail, with 500 feet of climbing, is the way in.
• Zion: April sits inside Zion's shuttle season, which runs every day from March through November. That means no private cars on the Zion Canyon Scenic Drive: the first Zion Canyon Line bus leaves the Zion Canyon Visitor Center (stop 1), and you ride it up the canyon.

Each park's April page carries the full note and the NPS page it comes from.

Theodore Roosevelt National Park scores highest for April (92/100): crowds at 7% of its peak, average highs of 56°F and 13.6 hours of daylight. Badlands and Lake Clark come next.

Compared with each park's own busiest month, the quietest in April are Lake Clark (under 1% of peak), Voyageurs (under 1% of peak) and Kenai Fjords (under 1% of peak). This leaves out parks in their harsh season or with main access typically closed. The least-crowded ranking covers every month.

Kobuk Valley (harsh conditions), Denali (main access typically closed), Acadia (main access typically closed), Lassen Volcanic (main access typically closed) and Isle Royale (main access typically closed) sit at the bottom of the April ranking. Each park's April page shows the numbers behind that, starting with Kobuk Valley in April.

Each park gets a score out of 100 for April: 45% weather comfort (NOAA 1991–2020 normals), 35% quietness (NPS visits, 2021–2025 average) and 20% daylight. Parks whose main access is typically closed lose points and are never marked as a best month. The same formula is used for every park.