Take the bus from the Shell station in Granada and tell the driver to drop you off at Mombacho. This ride is about 15 minutes and will cost you 5 cordobas, which is about $.30. Once you get to the road leading to the Volcan Mombacho, walk about 10 minutes to the park entrance and pay the $9 entrance fee, which includes the ride up the 7k road to the top. The jeep ride takes 30 minutes and only goes up 4 times a day: 8:30am, 10am, 1pm, and 3pm, so make sure you get there around one of these times, or you’ll be sitting around for a while. All the information at the station and along the trails is in Spanish, so unless you speak Spanish or have a translation book, you’ll have a hard time reading about the sites. The signs really don’t say anything more than what your eyes can see.
The Mombacho consists of two craters; each has a trail that circles the perimeter. Crater One’s hike is one kilometer, and Crater Two's hike is four kilometeres. Along the 1k trail, there are breathtaking, spectacular sights, and on a clear day, you can see for miles. The trail takes about 1½ hours, only because of all the stops you will make while viewing the sites.
The Lake of Nicaragua that contains the island of Ometepe is mainly what you can see from all the overlook points. You also can see the Laguna Apoyo and the 365 islands near the edge of the lake, all of which are great photos, but you cannot capture all of it in one picture unless you have a panoramic camera, because you see so much and so far. Also, at one point of the trail, you can take a small side trail that goes through a tunnel that is damp and lush in vegetation, created by the mountainside. Another cool side area has ventilation releases for the fumes built up inside the volcano. You can’t stay for too long, or your face will burn from the sulfur. The Mombacho is still somewhat active and last erupted in 2001, but there are no signs of this now.
The $9 entrance fee is a small price to pay for all the sites you get to see. Keep in mind that it also includes your ride to the top. The receptionist at the bottom said some people walk the road and end up regretting it. I wouldn’t want to hike the trail either, as it's almost completely vertical at some points. If you ever do make it to Granada, Nicaragua, the Volcan Mombacho is a must.