Milford's Mountain Bike Hub
Vietnam is about 1,000 acres spread across Milford, Holliston, and Hopkinton, with 47 of those acres owned outright by NEMBA. The terrain is classic New England granite, which means punchy climbs, exposed slabs, and singletrack that requires you to actually look where you're going. Vietnam has a reputation as a technical network. That reputation is earned. But there are ways around most of the big moves, and a lot of the cross-country riding here is fast and fun in ways that don't require any commitment to consequences.
The NEMBA Vietnam Land Management Committee works with all three towns to coordinate trail stewardship. Class 1 pedal-assist eBikes (no throttle, assist cuts off at 20 mph) are generally tolerated on the network, consistent with NEMBA's regional guidance. Class 2 and Class 3 eBikes -- anything with a throttle -- are not permitted. If your bike moves without you pedaling, keep it off Vietnam.
How the Network Is Laid Out
Vietnam can feel like a maze until you find the spines. The Main Trail is the backbone. It runs you toward the technical stuff on Rocky Ridge and the NEMBA parcel to the south, and down into the flowy terrain around Swamp Bypass and Swampside. The Fairbanks Trail branches off toward Kitchen, Three Ledges, and Toe Jam.
In the central section, Holliston Highway and the Milford Byway are the organizing corridors. Both come off the Adams Street lot via Adams Lot Trail or New Trail. College Rock is north via Beaver Brook Way or Top Down, then Farm Way, then College Rock Run.
What Vietnam Is Known For
The Kitchen area was once Vietnam's most concentrated zone of rock features, but nearby quarrying operations have degraded the approach trail and altered drainage in ways that have taken a toll on several lines. Some of the signature features are in rougher shape than they used to be. Whaleback Rock and Condo Rock are still rideable. Dolphin Rock has seen better days. Optional Rocks remains worth the trip for riders who know what they're doing.
The Three Sisters is a solid choice and insulated as it's more to the center of the network. Middle Sister in particular remains one of the most enjoyable low-commitment trails on the entire network. Check Trailforks for current condition reports before making Kitchen your primary destination -- conditions here change faster than the rest of Vietnam right now.
One rule worth remembering: the further south you go, the more technical it gets. Most of the serious features are on trails that drop off NEMBA Way -- Mind the Gap, Rubberstamp, Dirty Little Secret. The Gigg and Giggidy are worth the trip: fast, flowy downhills with real tech woven in.
4 Ways In
Adams Street is the main hub and where group rides start. The other three lots give you a head start on specific parts of the network.
Recent Trail Reports
Official condition reports pulled live from Trailforks. Always check before you ride — trail status can change quickly after rain or trail work.
Powered by Trailforks.com — official reporters only
Routes
Curated loops to help you get oriented. Route data and elevation profiles via Trailforks.
Mike's Intermediate Tour of Vietnam
A curated intermediate loop covering the best of Vietnam's blue-square network. Good introduction to the layout of the system without committing to the serious technical terrain.
Trail Map
Color-coded by difficulty. Tap any trail to see name, rating, and direction. Full interactive map on Trailforks.
Map data via Trailforks.com. Trail colors: Green Blue Black Double Black
Where to Start
Vietnam's green trails aren't a beginner consolation prize. They're actually fun. Expect smooth singletrack with the occasional root, gentle grades, and enough flow to feel like riding rather than surviving. Learn Adams Lot Trail and Holliston Highway first. Once you know those two corridors, the rest of the network stops feeling like a puzzle.
At 1.31 miles, Holliston Highway is the longest green trail in the network and probably the most important one to ride early. It's a spine trail for the central section -- nearly everything in that part of the network connects to it. Gentle grade, rideable in both directions, currently in ideal condition. New to Vietnam? Ride this one in your first hour. The network stops feeling like a maze pretty quickly after that.
View on Trailforks →The Heart of Vietnam
Eighty blue-square trails. This is where Vietnam's reputation actually lives. Rock rolls, rooted sections, punchy off-camber corners, the occasional drop. Most of the highest-rated trails in the network are blue. The Three Sisters flow trails are here. So is Middle Sister, which is as fun as anything at Vietnam without requiring you to know what you're doing on features.
The longest blue trail in the network at 0.82 miles, and the one that best captures what Vietnam riding feels like when it's working. Burial By-pass flows, climbs, drops, and keeps you honest at every turn. It's not trying to kill you. It's just not going to let you zone out either. That combination -- challenge that's earned, not imposed -- is why this trail has 7,598 check-ins and a 4.7 rating.
View on Trailforks →Vietnam's Signature Runs
Twenty-seven black diamond trails. Most are on Rocky Ridge or in the NEMBA parcel, and most run downhill or downhill-primary. Check direction before you drop in -- going up a downhill-only line is dangerous for everyone, not just you. The trails off NEMBA Way -- Mind the Gap, Rubberstamp, Dirty Little Secret -- are where the serious riders spend their time. The Kitchen area has some of the network's most technical features, but conditions have been inconsistent due to nearby quarrying activity; check Trailforks before committing to that zone.
Fast, flowy, and technically honest. The Gigg is the most-ridden black diamond at Vietnam and one of the most-ridden trails in the entire network. It rewards commitment and punishes half-measures, which is a fair trade given what it offers. Nearly 13,000 check-ins and a 4.75 community rating. Do your warm-up laps first.
View on Trailforks →For the Committed Few
Eight trails at the top of the scale: four Double Blacks and four Prolines. All run downhill or downhill-primary. All of them have real consequences. Know the rest of the network before you point yourself at any of these.
Ride Right
Trail data, ratings, and check-in counts sourced from Trailforks. Conditions are community-reported and update in real time. Always check Trailforks before you ride.