Sources:
1.1970 Ski Area Guide, Ziff-Davis: Birch Hill Ski Area
- Off NY 22, 9 miles N. of Brewster
2.1971 Ski Area Guide, Ziff-Davis: Birch Hill
- Off NY 22, 9 miles N. of Brewster
3.National Survey: Eastern Ski Atlas, 1972: Birch Hill Ski Area
- ON RT. 22, Patterson
4. National Survey: Eastern Ski Atlas, 1973: Big Birch Ski Area
- ON RT. 22, Patterson
5. All-state Motor Club 1972-3 Directory: Big Birch Ski Area
- Off NY 22, 8 miles N. of Brewster
6. White Book 77: Big Birch Ski Area
- Brewster - 10 mi, via Route 22; NYC - 65 mi. via I-684/22; Norwalk, CT - 45 mi. via Route 7, I-84 and Route 22
7. White Book 78: Same as 1977
8. White Book 93: Big Birch Ski Area
- Brewster - 10 mi, via Route 22; NYC - 65 mi. via I-684/22; Norwalk, CT - 45 mi. via Route 7, I-84 and Route 22
| Thunder Ridge(also: Big Birch, Birch Hill), Patterson | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ref. | Elev. Base | Size | Vertical | Longest Run | Trails | Slopes | Lifts | Exposure | Night | Snow Making |
| 1. | - | - | 300' | 1500' | 3 | 2 | Dbl. chair, T-Bar, 2 Ropes | - | yes | yes |
| 2. | - | - | 600 | 7920' | (2,4,0) | - | 2 Chairs, J-Bar, Platter, 2 Ropes | - | yes | yes |
| 3. | 2400' | - | 450' | - | 8(NIE) | 2 | 2 Dbl. Chairs, T-Bar, 3 Ropes | NW | - | yes |
| 4. | 2400' | - | 675' | - | 8(NIE) | 2 | 2 Dbl. Chairs, T-Bar, 3 Ropes | NW | - | yes |
| 5. | - | - | 450' | 4800' | 8 | 3 | 2 Dbl. chairs, T-Bar, 3 Rope | - | yes | yes |
| 6. | Top 1270' Base 820' |
1/2 pg. | 450' | 2400' | 11 | 3 | 2 Chairs, Bar, 2 Ropes |
- | yes | yes 90% |
| 7. | Top 1270' Base 820' |
1/2 pg. | 450' | 2400' | 11 (40%N, 30%I, 40%E)sic |
3 | 2 Chairs, Bar, 2 Ropes |
- | yes | yes 90% |
| 8. | Top 1320' Base 820' |
1/4 pg. | 500' | 5000' | 12 | 5 | 2 Dbl.Chairs, Triple, Bar, Rope |
- | yes | yes 100% |