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454 ft
Distance
10 ft
Climb
-33 ft
Descent
00:00:45
Avg time
-24 ft
Altitude change
313 ft
Altitude min
345 ft
Altitude max
337 ft
Altitude start
313 ft
Altitude end
-5.201%
Grade
-15.877%
Grade max
15.123%
Grade min
76 ft
Distance climb
337 ft
Distance down
41 ft
Distance flat
00:00:45
Avg time
Optional Rocks Details
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Activities
- Mountain Bike
- E-Bike
- Hike
- Trail Running
- Snowshoe
- Nordic Ski
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Riding AreaVietnam Trail Network
Milford, Massachusetts -
Difficulty Rating
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Local Popularity95 in Mountain Biking [+]
- 90 in E-Biking
- 85 in Trail Running
- 100 in Hiking
- 5 in Snowshoeing
- 5 in Nordic Skiing
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Global Ranking#3501 in Mountain Biking [+]
- #13823 in Trail Running
- #11091 in Hiking
- #1373 in Snowshoeing
- #2969 in Nordic Skiing
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Trail TypeSingletrack
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Bike TypeAM, XC
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DirectionDownhill Primary
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Climb DifficultyGreen
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Physical RatingHard
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Dogs AllowedYes
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eBike Allowed
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TTFs on TrailDrop, Jump, Rock Face, Rock Garden, Roller Coaster
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Land Owner
Optional Rocks is a short trail that traverses the spine of a big whaleback with a very steep 12 foot roll-down and small drop-off lower down on the trail. Only if you are comfortable with steep rollers
Access Info
Optional Rocks starts about fifty yards down from the Holliston Highway on Town Forest Trail, on the right, and spills out further down, around the sharp bend in Town Forest Trail.
Local Trail Association
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-
Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 31 rides
- 9 miles average
6 Months
- 283 rides
- 8 miles avg distance
All
- 4,987 rides
- Last: Jul 17, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Optional Rocks Trail Reports
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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
Trail Flow (Ridden Direction)
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Ridden
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- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
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Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
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BC Backroad Status
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Directions to optional-rocks trailhead
(42.175840, -71.485650)
Videos
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Trail Lists
-
VIetnam Top Trails
9 trails
Routes with this trail
Vietnam Hall of Fame Featured
★ 3.9 • 8 miles • 628 ft • 32 • Loop •
This route is designed as a good introduction to everything Vietnam has to offer.It passes through the...
★ 4.0 • 12 miles • 1,225 ft • 19 • Loop •
Built this loop for YouTuber BKXC for his visit to Vietnam. Its all of my favorite trails smashed into one...
★ 1.0 • 3 miles • 281 ft • 7 • Point to Point •
The Nam Challenge for this month continues where we left off on the north side of the area. This challenge...
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Nearby Trails
- Sneaky Quickie 502 ft
- Town Forest Trail 568 ft
- Sudden Impact 892 ft
- Si Connector 915 ft
- Campfire Trail 919 ft
Vietnam Trail Network
- By WillieJacobsz
Trailforks SBP SWW & contributors - #126041 - 2,066 views
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Frequently Asked Questions About Optional Rocks
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Where is Optional Rocks located?
Optional Rocks is located in Vietnam Trail Network, Milford, Massachusetts, United States. It is part of the Vietnam Trail Network trail network. The trailhead is located at coordinates 42.17584, -71.48565.
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How hard is Optional Rocks?
Optional Rocks is rated as Black Diamond difficulty. The physical rating is Hard. The average grade is 5.201%. The climb difficulty is rated Green.
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What is the elevation gain for Optional Rocks?
Optional Rocks has 10 ft of elevation gain. The trail has 33 ft of elevation descent. The elevation ranges from 313 ft to 345 ft.
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Is Optional Rocks a point to point trail?
Optional Rocks is not a point to point trail. The direction is Downhill Primary. The trail type is singletrack.
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