Here are some excerpts from other internet sources on the tracks and trails in this area of Khao Yai National Park.....
From
iguide.travel/Prachinburi_(province)/Act...teresting_Activities
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Khao Samo Pun Route
Located in Amphoe Mueang and Amphoe Prachantakham, a total distance of 30 kilometres, which takes about 3 - 4 days. Tourists can choose many starting and finishing points such as Khao Yai National Park Safeguard Unit 12 (Noen Hom), Unit 11, (Khlong Pheka), or Unit 10 (Prachantakham) or use the route to Khao Khiao. Major tourist attractions include Thung Na Pha, Thung Phrommachan, Lan Suriyan, Thung Hin Pratu Mueang, field of ferns, field of wild flowers, as well as waterfalls such as Namtok Hin Tat, Namtok Bang-oen, and Namtok Heo I Am along the route.
Namtok Som Poi -Tat Hin Yao - Thung Ngu Lueam Route
Starting from Namtok Som Poi, Tambon Bu Fai, Amphoe Prachantakham, to Namtok Sai Khu, Namtok Kaeng Kritsana, Tat Hin Yao, Thung Na Prang, and Thung Ngu Lueam, a total distance of 10 kilometres, which takes 2 - 3 days for a round trip. If choosing to go via Thung Hin Lek Fai to Namtok Heo I Am, the distance will be 15 kilometres, with a duration of 3 days.
Namtok Takhro - Namtok Heo Chakkachan Route
A short route starting from Khao Yai National Park Safeguard Unit 10 (Prachantakham) to Namtok Takhro, and across the suspension bridge to Namtok Salat Dai. The route ends at Heo Chakkachan Waterfall, a total distance of 6 kilometres, with a duration of 2 days and 1 night.
Khao Yai National Park Safeguard Unit 10 Route (Prachantakham - Namtok Fong Sabu)
The route starts from Khao Yai National Park Safeguard Unit 10 and walk uphill, via Khlong Takhian Phrong, to Namtok Fong Sabu. On the return trip, stop by to visit Namtok Heo Ta Khon Dam, a total distance of 12 kilometres, with a duration of 2 days.
Namtok Takhro - Namtok Wang Heo - Sai Yai Route
Start from Khao Yai National Park Safeguard Unit 10 and head northeast to the beautiful Namtok Wang Heo. Stop by to visit the dinosaur footprints. On the returning route, pass Kaeng Hin Poeng at Khao Yai National Park Safeguard Unit 9 (Sai Yai), Amphoe Na Di , Prachin Buri. The total distance is about 25 kilometres, with a duration of 3 - 4 days. For further details, please contact Khao Yai National Park Safeguard Unit 10, Amphoe Prachantakham, Prachin Buri."
From AVIS website......
Namtok Takhro and Namtok Salatdai
Both waterfalls are located in Ban Takhro, Tambon Bu Fai . Takhro Waterfall is wide with suspension bridge, with the hills on the left, while on the right is the forest which is suitable for relaxation. From Takhro Waterfall, there is a walkway along the stream for another 2 kilometres to Salad Dai Waterfall. On the way, there are many areas for swimming. To go to Salat Dai Waterfall, tourists should contact the escort officer at 10th Ranger Unit of Khao Yai National Park at Takhro Waterfall. From Prachin Buri town, use Highway No.3452 (to Prachantakham) for 16 kilometres, turn right to Highway No.33 to Prachantakham Intersection, and turn left into an access road. Or from Noen Hom Intersection, turn right to Highway No.33 to See Yaek Prachantakham, and turn left to the access road ford for 16 kilometres, and walk for about 500 metres more to Takhro Waterfall.
Namtok Than Thip
This waterfall is in Ban Noen Hin Tang, Tambon Nong Kaeo. The stream runs pass different levels of rocks whereby some areas are suitable for swimming. The surrounding forests are naturally fascinating. Travel to the waterfall by using the same route to Takhro Waterfall, and turning left at 9th kilometre, for about 9 kilometres.