Esja Mountain:

1. Easily accessible with public bus, take bus number 11 from Blue House and change at Hlemmur Station to bus 15. There's a large parking lot at the base of the mountain, complete with maps of Iceland and information on the local area and hiking trails . This is where your hike begins.
   
2. Mt. Esja stands 914 meters (2,999 feet) high and can be climbed year-round, weather permitting. The trail is well-defined and marked, with clear sections that indicate varying levels of difficulty. Each section has signs with a grading system ranging from one boot (easy) to three boots (challenging). 
3. At sign 3, experienced climbers can choose to take a direct route to the top, while the main trail veers to the right.
   
4. About 200 meters below the summit, at station 5, there's a large rock called "Steinn." This is typically where less experienced hikers turn back, as the path becomes steeper and more hazardous from this point onward, involving rock climbing and cliffs. 
5. It's not recommended attempting the climb beyond Steinn during winter unless you're a skilled climber with high-quality gear. A scenic river flows down the mountainside, adding to the hike's charm with its soothing sound. The trail itself is beautiful and enjoyable, offering breathtaking views of Reykjavík and its surroundings as you ascend. Mt. Esja is a popular spot for those training for more strenuous hikes or for runners seeking a challenging route. Expect to see other hikers on your way up, especially during weekends and in the summer. Be sure to wear sturdy hiking boots and dress in appropriate outdoor clothing. If you're hiking in winter, it's advisable to bring crampons for added traction on icy paths.

Reykjadalur:

1. Begin your hike at the main parking lot near Hveragerði. The trailhead is clearly marked and easily accessible. Be sure to check the weather conditions before you start.
   
2. The trail begins with a gradual ascent through grassy hillsides. Follow the well-marked path, which is wide and clear. This section is moderately steep but manageable for most hikers.
   
3. After about 30 minutes of hiking, you'll reach an observation point with stunning views of the surrounding landscape and the town of Hveragerði below. Take a moment to rest and enjoy the scenery.
   
4. As you continue, you'll encounter several geothermal streams and hot springs. Be cautious, as the water in some areas can be extremely hot. Stick to the designated trail for safety.
   
5. Approximately 45 minutes into the hike, you'll reach the hot river. This is the main attraction of Reykjadalur, where you can bathe in naturally heated water. There are changing screens for privacy, but it's a good idea to wear swimwear under your hiking clothes for convenience.
   
6. Find a suitable spot along the river to relax and enjoy the warm water. The temperature varies, so test the water before fully immersing yourself. Be respectful of other hikers and the environment.
   
7. After enjoying the hot river, retrace your steps back to the parking lot. The return hike is mostly downhill, making it easier on the way back.    
   

 

Glymur Waterfall:

1. Begin at the parking lot near Botnsá, which serves as the trailhead for Glymur. From Reykjavík, take Route 1 north and then turn onto Route 47 along the southern side of Hvalfjörður. Follow the signs to the parking area.
   
2. Cross a small wooden bridge at the start of the trail, then follow the path through a dense forested area. The trail is clearly marked and easy to follow.
   
3. About 30 minutes into the hike, you'll need to cross the Botnsá River. The river can be fast-flowing and slippery, so take care. In winter or during high water, crossing can be dangerous, so plan accordingly.
   
4. After crossing the river, the trail begins to climb steeply. Follow the well-defined path as it winds through rocky terrain. Along the way, there are several viewpoints where you can stop to rest and admire the scenery.
   
5. As you ascend, you'll come across a natural rock arch known as "Ôvottahellir." This makes for a unique photo opportunity and a brief break before the final climb to the waterfall.
   
6. Continue along the trail until you reach a viewpoint overlooking Glymur waterfall. The view is spectacular, with the waterfall plunging into a deep canyon. Be cautious near the edges, as there are no safety rails.
   
7. You have the option to continue the loop trail, which crosses the river at the top of the waterfall and descends on the opposite side. This loop requires another river crossing and can be challenging, especially in high water. Alternatively, you can return the way you came for a safer descent.
   

 

Heidmark:

1. Getting to Heiðmörk: From Reykjavík, drive towards Hafnarfjörður and follow the signs to Heiðmörk. The main entrance to the reserve is via Route 408. Once inside, you'll find parking areas and maps indicating the different trails.
   
2. Heidmörk has several trails of varying lengths and difficulty. The most popular trails are the "Redhólar" loop, which explores volcanic craters, and the "Kaldársel" trail, which takes you through a unique landscape of lava formations and forested areas. Select a trail that matches your experience level and available time.
   
3. Follow the designated trail from the parking area. The paths are generally well-marked, but it's always helpful to have a map or a GPS device for orientation. Begin your hike through the lava fields or forested areas, depending on the trail you chose.
   
4. If you choose the Redhólar loop, you'll hike around a series of red volcanic craters. The scenery is striking, with contrasting colors and unique rock formations. Take time to explore the area and enjoy the views from the crater rims.
   
5. The Kaldársel trail takes you through a dense forest and past old lava fields. You'll find remnants of ancient lava flows and various species of trees. This trail offers a different perspective from the volcanic terrain, with more shade and greenery.
   
6. Heidmörk is home to a variety of birds, particularly around the Elliðavatn lake. Keep an eye out for birdwatching opportunities and other wildlife. Along the trails, you'll encounter diverse plant life and interesting geological features.
   
7. Once you've completed your chosen loop or trail, follow the signs back to the parking area. Take your time to enjoy the surroundings and capture photos along the way.    
   

 

Helgafell:

1. From Reykjavík, drive towards Hafnarfjörður and follow the signs towards Mosfellsbær and Kaldárselsvegur. Continue on Kaldárselsvegur until you reach the parking area near the trailhead for Helgafell.
   
2. Begin your hike from the parking area. The trailhead is easily accessible, and the path is generally well-marked. Initially, the trail is relatively flat as it leads through a mix of lava fields and sparse vegetation.
   
3. As you progress, the trail starts to ascend. The incline is gradual but consistent, offering a moderate challenge. Follow the designated path as it winds up the mountain. There may be rocky sections, so watch your footing.
   
4. Along the ascent, take breaks to enjoy the views. On clear days, you can see Reykjavík in the distance and the surrounding lava fields. The landscape offers a beautiful contrast between rugged volcanic terrain and lush greenery.
   
5. After about an hour of hiking, depending on your pace, you'll reach the summit of Helgafell. From the top, enjoy panoramic views of Hafnarfjörður, Reykjavík, and the Reykjanes Peninsula. It's an excellent spot for photos and taking in the scenery.
   
6. ​When you're ready to descend, follow the same trail back to the parking area. The return journey is generally quicker due to the downhill gradient. Be careful on steep or rocky sections, and take your time to ensure safety.