Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Mountain | Elevation | Range | State(s) | Surface |
| --- | --- | --- | --- | --- |
| Richland Balsam | 6,410 ft/1,950 m | Great Balsam Mtns. | N.C. | Grassy |
| Black Balsam Knob | 6,214 ft/1,894 m | Great Balsam Mtns. | N.C. | Grassy |
| Grassy Ridge Bald | 6,189 ft/1,886 m | Roan Highlands | N.C. | Grassy |
| Andrews Bald | 5,920 ft/1,804 m | Great Smoky Mtns. | N.C. | Grassy |
| Round Bald | 5,826 ft/1,775 m | Roan Highlands | Tenn. / N.C. | Grassy |
| Jane Bald | 5,820 ft/1,773 m | Roan Highlands | Tenn. / N.C. | Heath/Grassy |
| Silers Bald | 5,607 ft/1,709 m | Great Smoky Mtns. | Tenn. / N.C. | Grassy/Young forest |
| Hump Mountain | 5,587 ft/1,703 m | Roan Highlands | Tenn. / N.C. | Grassy |
| Buck Bald | 5,560 ft/1,609 m | Great Balsam Mtns. | N.C. | Grassy |
| Huckleberry Knob | 5,560 ft/1,609 m | Unicoi Mtns. | N.C. | Grassy |
| Whitetop Mountain | 5,540 ft/1,688 m | Grayson Highlands | Virginia | Grassy |
| Big Bald | 5,516 ft/1,681 m | Bald Mtns. | Tenn. / N.C. | Grassy |
| Thunderhead Mountain (middle summit) | 5,485 ft/1,672 m | Great Smoky Mtns. | Tenn. / N.C. | Heath |
| Hooper Bald | 5,429 ft/1,655 m | Unicoi Mtns. | N.C. | Grassy |
| Yellow Mountain | 5,420 ft/1,652 m | Roan Highlands | Tenn. / N.C. | Grassy |
| Hemphill Bald | 5,400 ft/1,646 m | Great Smoky Mtns. | N.C. | Grassy |
| Stratton Bald | 5,360 ft/1,634 m | Unicoi Mtns. | N.C. | Grassy |
| Wayah Bald | 5,342 ft/1,628 m | Nantahala Mtns. | N.C. | Heath |
| Tusquitee Bald | 5,240 ft/1,597 m | Nantahala Mtns. | N.C. | Grassy |
| Maddron Bald | 5,200 ft/1,585 m | Great Smoky Mtns. | Tennessee | Heath |
| Siler Bald | 5,200 ft/1,585 m | Nantahala Mtns. | N.C. | Grassy |
| Sandymush Bald | 5,152 ft/1,507 m | Central Blue Ridge Mtns. | N.C. | Grassy |
| Cheoah Bald | 5,062 ft/1,543 m | Cheoah Mtns. | N.C. | Grassy |
| Gregory Bald | 4,949 ft/1,508 m | Great Smoky Mtns. | Tenn. / N.C. | Grassy |
| Spence Field | 4,920 ft/1,500 m | Great Smoky Mtns. | Tenn. / N.C. | Grassy/Young forest |
| Brasstown Bald | 4,784 ft/1,458 m | Southern Blue Ridge Mtns. | Georgia | Heath |
| Ben Parton Lookout | 4,754/1,449 m | Great Smoky Mtns. | Tennessee | Heath |
| Parson Bald | 4,732 ft/1,442 m | Great Smoky Mtns. | Tenn. / N.C. | Grassy |
| Rabun Bald | 4,696 ft/1,431 m | Southern Blue Ridge Mtns. | Georgia | Heath |
| Max Patch Mountain | 4,629 ft/ 1,411 m | Bald Mtns. | N.C. | Grassy |
| Russell Field | 4,455 ft/1,358 m | Great Smoky Mtns. | Tenn. / N.C. | Grassy/Young forest |
| Elk Garden | 4,450 ft/1,356 m | Grayson Highlands | Virginia | Grassy |
| Beauty Spot | 4,437 ft/1,352 m | Unaka Mtns. | Tenn. / N.C. | Grassy |
| Big Bald Mountain | 4,075 ft/1,242 m | Southern Blue Ridge Mtns. | Georgia | Grassy |
Question:
What is the surface of the mountain range that contains the Elk Garden Mountain?
Answer:
Grassy