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454 ft
Distance
10 ft
Climb
-33 ft
Descent
00:00:46
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
00:00:46
Avg time
Optional Rocks Details
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Activities
- Mountain Bike
- E-Bike
- Hike
- Trail Running
- Snowshoe
- Nordic Ski
-
Riding AreaVietnam Trail Network
Milford, Massachusetts -
Difficulty Rating
-
Local Popularity95 in Mountain Biking [+]
- 85 in E-Biking
- 85 in Trail Running
- 95 in Hiking
- 90 in Snowshoeing
- 95 in Nordic Skiing
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Global Ranking#42537 in Mountain Biking [+]
- #110210 in E-Biking
- #99427 in Trail Running
- #91454 in Hiking
- #3968 in Snowshoeing
- #9768 in Nordic Skiing
-
State Ranking#509 in Mountain Biking · Massachusetts [+]
- #450 in E-Biking
- #2,960 in Trail Running
- #2,965 in Hiking
- #405 in Snowshoeing
- #125 in Nordic Skiing
-
Trail TypeSingletrack
-
Bike TypeAM, XC
-
DirectionDownhill Primary
-
Climb DifficultyGreen
-
Physical RatingHard
-
Dogs AllowedYes
-
eBike Allowed
-
TTFs on TrailDrop, Jump, Rock Face, Rock Garden, Roller Coaster
-
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
-
-
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
- 9 rides
- 7 miles average
6 Months
- 449 rides
- 8 miles avg distance
All
- 5,205 rides
- Last: Oct 23, 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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3D
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)
Trailforks scans users activity logs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
Trailforks scans activity logs to determine the last time a trail was ridden.
- < 2 days
- < 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
Contribute Details
Colors indicate trail is missing specified detail.
- Description
- Photos
- Description & Photos
- Videos
Trail Popularity ?
Trailforks scans activity logs 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.
Think of this as a heatmap, more activities = more kinetic energy = warmer colors.
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- popular
- less popular
- not popular
ATV/ORV/OHV Filter
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Activity Recordings
Trailforks uses anonymized public activity data.
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Activity Recordings
Trailforks uses anonymized public activity data.
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Winter Trails
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Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
BC Backroad Status
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Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.
Slope Aspect
Direction the slope faces
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Directions to optional-rocks trailhead
(42.175840, -71.485650)
Photos
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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 312 ft
- Town Forest Trail 354 ft
- Sudden Impact 554 ft
- Si Connector 568 ft
- Campfire Trail 571 ft
Vietnam Trail Network
- By WillieJacobsz
Trailforks SBP SWW & contributors - #126041 - 2,287 views
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