· UP Cascade subdivision from Klamath Falls to Chemult [and Oakridge]
Klamath Falls is at an altitude of 4,105 ft. The ex-SP Klamath Falls freight yard (MP 428.7, el. 4,094 ft.) is on the east side of the line, immediately north of Bieber Line Junction. The Klamath Falls depot (MP 429.9, el. 4,105 ft.) is on the west side of the line, north of the UP freight yard, with the UP crew office just to its south. The speed limit through this area is 25 mph. North of the yard and depot area, a road passes underneath the railroad, the line turns northwest at the end of Yard Limits Absolute Block and the start of single-track CTC, there is a grade crossing, US 97 runs alongside to the east, two road bridges pass overhead, a road passes underneath, and there is a large lumber mill on the west side of the line. At Chelsea (MP 431.9, el. 4,200 ft.), there is a road bridge overhead, there are hills between the line and the lake to the west, then marshland between the line and the lake, and the line comes along the east shore of the large (in area) but shallow Upper Klamath Lake and turns due north, following the curves of the lake shore when required. There is a 6,241 ft. siding at Wocus (MP 433.5-434.8, el. 4,165 ft.), a 6,152 ft. siding at Algoma (MP 438.0-439.3, el. 4,153 ft.), with a slide fence above the line to the east side, but below US 97, also on the east side, and at detector at MP 442.6, where the line turns north-northwest following the shore of the lake. At Modoc Point, where there is a 6,156 ft. siding (MP 446.9-448.1, el. 4,153 ft.), the line turns north, away from the lake.
There is a grade crossing, a spur trails in on the east side at Lobert (el. 4,176 ft.), and US 97 has moved away from the east side, a grade crossing, US 97 is back alongside to the east, and another grade crossing. There is a 6,218 ft. siding at Chiloquin (MP 456.8-458.0, el. 4,188 ft.), with bracket signals at the south end and a grade crossing right at the north end, and a detector at Pine Ridge (MP 458.7, el. 4,200 ft.). The line curves back and forth for a few miles as it makes the transition from lakeshore and valley to running along the boundary between the mountains to the west and the desert to the east. There is a 7,161 ft, siding at Calimus (MP 464.9-466.4, el. 4,495 ft.)), with a grade crossing within the siding, and bracket signals at the north end. The river is in a gorge on the west side, below the line. A grade crossing crosses a dirt road. From here, the line runs due north all the way to Chemult, passing Kirk (MP 470.3, el. 4,531 ft.), a detector at MP 472.0, and a 6,189 ft. siding at Fuego (MP 473.6-474.9, el. 4,523 ft.), with a bracket signal at the north end. There is a grade crossing, another one with a gate on the east side, and another grade crossing. The land to the east of the line is now flat grassland.
There is a 6,162 ft. siding at Lenz (MP 482.9-484.2, el. 4,555 ft.), with a signal bridge crossing the entire line, a detector at Mazama (MP 487.1, el. 4,600 ft.), a 6,150 ft. siding at Yamsay (MP 491.8-493.0, el. 4,650 ft.), with a signal bridge across the track, a 6,160 ft, siding at Diamond Lake (MP 497.2-498.5, el. 4,664 ft.), with a signal bridge across the track, a grade crossing, and a detector at MP 501.0. At Chemult, where there is a 9,266 ft. siding from MP 502.2 to MP 504.1, and a passenger platform on the west side of the line at MP 502.8, el. 4,759 ft., the BNSF (ex-BN, ex-GN) line to Bend, OR, and the Columbia River heads off to the northeast and then north, and the ex-SP line turns north-northwest and then northwest to cross the Cascades.