Glacier Peak Wilderness is a 566,057 acre , 35 mi , 20 mi wilderness area located within portions of Chelan, Snohomish, and Skagit counties in the North Cascades of Washington.
 The area lies within parts of Wenatchee National Forest and Mount Baker National Forest and is characterized by heavily forested stream courses, steep-sided valleys, and dramatic glacier-crowned peaks.
 The dominant geologic feature of the area is 10,541 ft Glacier Peak.
 It is the most remote major volcanic peak in the Cascade Range and has more active glaciers than any other place in the lower forty-eight states.
 Glacier Peak is a volcanic cone of basalt, pumice, and ash which erupted during periods of heavy glaciation.
Pico de Orizaba, also known as Citlaltépetl (from Nahuatl "citlal(in)" = star, and "tepētl" = mountain), is a stratovolcano, the highest mountain in Mexico and the third highest in North America, after Denali (formerly known as Mount McKinley) of the United States and Mount Logan of Canada.
 It rises 5636 m above sea level in the eastern end of the Trans-Mexican Volcanic Belt, on the border between the states of Veracruz and Puebla.
 The volcano is currently dormant but not extinct, with the last eruption taking place during the 19th century.
 It is the second most prominent volcanic peak in the world after Africa's Mount Kilimanjaro.
Hager Mountain is a volcanic peak in Oregon in the northwest corner of the Basin and Range Province in the United States.
 The mountain is located south of the small unincorporated community of Silver Lake in south-central Oregon, and it is in the Fremont–Winema National Forest.
 On the summit, there is a fire lookout operated during the summer and fall by the United States Forest Service.
 There are several hiking trails that lead to the lookout station.
Martin Tritschler was a manufacturer and retailer of clocks that arrived in Mexico in 1833 from Germany, and was thus part of the first generation of non-Spanish immigrants after independence.
 He also participated prominently in the war against the United States, gave aid to the victims of the explosion of the Colecturía de San Andrés, during the Second French Intervention, and in 1873 he became the first man to fly the flag of Mexico on the summit of Pico de Orizaba.
 He was the father of Mexican archbishops Martín Tritschler y Córdova and Guillermo Tritschler y Córdova.
Level Mountain is an immense volcanic massif in the Northern Interior of British Columbia, Canada.
 It is 50 km north-northwest of Telegraph Creek and 60 km west of Dease Lake on the Nahlin Plateau.
 With a maximum elevation of 2166 m , it is the third highest of five large volcanic complexes in the Northern Cordilleran Volcanic Province (NCVP).
 Much of the massif is gently-sloping; when measured from its base, Level Mountain is about 1100 m tall, slightly taller than its neighbour to the northwest, Heart Peaks.
 The lower broader half of Level Mountain consists of a shield-like edifice while its upper half has a more steep, jagged profile.
 Its summit is dominated by the Level Mountain Range, a small mountain range with prominent peaks cut by deep valleys.
 These valleys serve as a radial drainage for several small streams that flow across the volcano.
 Meszah Peak is the only named peak in the Level Mountain Range.
Mount Tehama (also called Brokeoff Volcano or Brokeoff Mountain) is an eroded andesitic stratovolcano in the Cascade Volcanic Arc and the Cascade Range in Northern California.
 Part of the Lassen volcanic area, its highest remaining remnant, Brokeoff Mountain, is itself the second highest peak in Lassen Volcanic National Park and connects to the park's highest point, Lassen Peak.
 Located on the border of Tehama County and Shasta County, Tehama's peak is the highest point in the former.
 The hikers that summit this mountain each year are treated to "exceptional" views of Lassen Peak, the Central Valley of California, and many of the park's other features.
 On clear days, Mount Shasta can also be seen in the distance.
San Antonio Mountain is a free-standing volcanic peak in Rio Arriba County, New Mexico.
 With an elevation of 10,908 feet, San Antonio Mountain is the highest peak within the Taos Plateau volcanic field, the largest volcanic field within the Rio Grande Rift valley.
The Laguna Volcanic Field, also known as the San Pablo Volcanic Field, is a volcanic field in the Philippines, located between Laguna de Bay, Mount Banahaw volcano complex and Mount Malepunyo range.
 It is part of the larger Southwestern Luzon Volcanic Field (SWLVF).
 From Manila, it is about 50 km southeast to Mount Makiling, its most prominent volcanic feature.
Mount Fee is a volcanic peak in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada.
 It is located 13 km south of Callaghan Lake and 21 km west of the resort town of Whistler.
 With a summit elevation of 2162 m and a topographic prominence of 312 m , it rises above the surrounding rugged landscape on an alpine mountain ridge.
 This mountain ridge represents the base of a north-south trending volcanic field which Mount Fee occupies.
Mount Callaghan is a volcanic peak located east of the headwaters of the Squamish River, just northeast of the Powder Mountain Icefield and just south of the Pemberton Icefield in the Sea to Sky Country of southwestern British Columbia, Canada, about 20 km directly west of the Resort Municipality of Whistler.
 A crack was observed across Callaghan's summit in the spring of 1999.
 In 2000, a section of the summit collapsed.
 Callaghan Lake lies below the south face of the mountain.

Question: Martin Tritschler flew the flag of Mexico on the summit of this mountain, which is second most prominent volcanic peak after which mountain?
Answer: Africa's Mount Kilimanjaro