13 miles
1,968 ft
-1,988 ft
Avg time
Trail Supporters, Builders & Maintainers of Henry Hagg Lake Trail

Henry Hagg Lake Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Forest Grove
    forest grove, Oregon
  • Difficulty Rating
  • Trail Type
  • Bike Type
    AM, XC
  • Trail Usage
  • Direction
    Both Directions
  • Climb Difficulty
  • Physical Rating
  • Season
  • Dogs Allowed
  • Global Ranking
    #43935 in Mountain Biking
  • Local Popularity
    100 in Mountain Biking [+]
    • 5 in Trail Running
    • 5 in Hiking
  • Land Manager

The trail around Hagg Lake is a close-to-portland Gem, with over 13 miles of single track, and a little over a thousand feet of climbing. The trail is generally muddy and unridable in the winter (in other words this is *NOT* a winter ride destination). The rest of the year it can be great, but sometimes gets overgrown with blackberries and other greenery. This is some Poison Oak present off-trail.

The NWTA Bike Patrol was first initially focused on patrolling this trail with Memorandum of Understanding with Washington County.

There is only one trail which circumnavigates Hagg Lake. Many folks prefer to ride clockwise, but those who ride it much seem to prefer counterclockwise.
Many folks like to go just across the Dam (left right after entering the park), but I prefer to go to the next (smaller) parking lot past the big dirt one. Then I ride back across the dam.
There are quite a few places where hiking/fishing trails cross the loop trail, but if you take a wrong turn you can't go very far.

NOTE: There is access fee. See misc section below for details.
This trail offers a lot of amazingly fun riding as well as a little taste of each of the worst things western oregon has to offer for mountain bikers. Fortunately, each of those worst things is generally easy to avoid or adapt to if you know what to expect and know what to avoid.
Things to Avoid:

1. Avoid open, sun drenched and low lying meadows at all costs during the summer growing season. It isn't humanly possible to keep up with the overgrowth in these areas. If there is a sign that says "Ecologically Sensitive" find the nearest spur and ride up to the road and bypass it. This isn't to protect the area, it's to protect you. In western Oregon, the ecology is sensitive like a rabid alley cat. It's easy for you to cause some damage, but you're going to get hurt in the process. The trail is heavily rutted through this area and the vegetation has grown in to conceal some very dangerous potholes and deep ruts. There are deep holes full of prickly things that'll swallow you and your bike no problem.

2. Watch out for spurs that descend to the lake. There are a lot of little fishing trails that are easy to get lost on.

3. Watch out for swimmers on the trail These are not the typical savvy outdoorsman hikers you're used to running across on trails. These people don't get out in the woods a lot, they're wearing flip-flops, and they don't know trail etiquette. Just get out of their way, be very patient, and offer encouraging smiles and a good attitude. They're often blocking the trail on the North side near the overgrown ecologically sensitive meadow kind of close to where the creek enters the reservoir. That's one more good reason to just bypass that area by using the road. Also, as a side note, I would really suggest you DON'T offer these people your opinion about their behavior, no matter how stupid. Remember that they're also drinking and they're probably a bit more uptight than your average mountain biker.

4. Poison Oak: There is some. It's mostly on the south side under the trees. Be careful.

So, if you've managed to avoid the prickly and rutted open meadows, the rest of this trail is pretty sweet! All the tree covered parts are amazing. Just go clockwise, the trail undulates wildly with a pretty randomly even mix of rolling hills throughout. There are few sustained climbs but a lot of short steep ones. Keep your momentum up and make sure you're in the right gear and you'll be fine. There's still sporadic undergrowth encroaching on the trail under the canopy, but nothing that even approaches the disaster going on in the meadows. Seriously, the canopied parts of this trail are a blast! You'll probably have to bail and walk the bike quite a few times, which means you're having fun, right? The best way to enjoy this trail is to take the nearest spur up to the road every time you see a meadow, then drop back in where you think it goes through the forest. This is especially important right after the bridge that crosses the inlet creek. When you hit that bridge, stay on the road for a couple of miles until you see a tiny parking lot on the right side at 45.49498, -123.21833 and you'll hit what is by far the best part of the trail as it undulates for about 4-5 screaming miles back to the dam.
So, stay out of the meadows, and this is an awesome trail.

The Clockwise Loop - Go across the damn after entering the parking lot, then park at the large parking lot on your right, just across the damn. From there, ride down the road to a small paved pull-out parking area, and head down the trail.
Soon you'll cross a bridge that NWTA helped construct, then you will come to a picnic area and the large Boat Ramp C area, where there are bathrooms and a food vendor (and water).

Continue on the south side of the lake, going clockwise, until you come to the west end of the lake, where the trail dumps you out on the road. Continue around the west end of the lake, going about 1/4 mile until you see the trail jump into the woods again. This enters the Butterfly area. Be careful to stay on the trail here.
Continue until Boat Ramp A. You are dumped on the road a couple of times, but carefully ride along the right side of the road and jump back on the trail when you see it.

After Boat Ramp A it's only a mile or two to the damn, going behind the Ranger Station (fenced with chain link). Ride back across the damn and you are at your car with a smile!

The Counter-Clockwise Loop" - Start as you do for the CW loop, but ride the other direction. Be sure to be careful when on the road, since you will need to get off the trail, cross the road, go a little ways, cross the road again to the next section of the trail. Watch for cars, but this direction is preferred by some.

The Sain Creek Out and Back -- Drive on south side of lake to the Sain Creek area, park carefully off the road, and ride CCW on the trail, which enters from the road there. Head until the NWTA bridge, then back.
The Boat Ramp Loop -- Some like to park at Boat Ramp A, since it has water, bathrooms, and a bike wishing hose. Otherwise, the loop choices are the same.

NOTE: Always be careful of hikers and fisher persons when on this trail, especially on the weekends, and especially around the Boat Ramps and Picnic area.

Access Info

HWY47 south of Forest Grove, head west on Scroggins Creek Rd. Fee Area! Self Service at the gate! $5, Annual Passes available. You can pick up this trail literally anywhere around the lake.

More Stats for Henry Hagg Lake bike trail
  • Altitude change
    -20 ft
  • Altitude min
    300 ft
  • Altitude max
    421 ft
  • Altitude start
    332 ft
  • Altitude end
    313 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    6 miles
  • Distance down
    6 miles
  • Distance flat
    1 miles
  • Avg time
  • Avg reverse time
  • view trail stats
on Aug 28, 2019
Avg: 3.2 (5 votes)

view (47)
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
Trail Ridden Direction
Trailforks scans users ridelogs 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 riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
Trail Last Ridden
Trailforks scans ridelogs 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
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
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. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
  • most popular
  • popular
  • less popular
  • not popular

Trail Difficulties
  • Access Road/Trail
  • White
  • Green
  • Blue
  • Black
  • Double Black Diamond

Trail Report Status
  • Clear / Green
  • Minor Issue / Yellow
  • Significant Issue / Amber
  • Closed

  • Land Owner Overlay
  • Wilderness (typically no bikes in USA)
  • BLM (public)
  • USFS (Wildlife sanctuaries darker than usfs)
  • State land
  • Indigenous
  • Military
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Dry
  • Very Dry
  • Map Markers
  • trail Trail Head
  • photo Photo
  • place Directory Listing
  • region Riding Area
  • Parking Parking
  • Viewpoint Viewpoint
  • Information Information
  • Warning Warning
  • Directions Directions
  • Sight Sight
  • Restrooms Restrooms
  • eBike Charging Point eBike Charging Point
  • Water Fountain/Source Water Fountain/Source
  • Gate Gate
  • Trail Sign Trail Sign
  • Table or Bench Table or Bench
  • Ladder Ladder
  • Stairs Stairs
  • Bridge Bridge
  • Camping Camping
  • Cabin Cabin
  • Lodge Lodge
  • Bear Cache Bear Cache
  • Dock Dock
  • Ranger Station Ranger Station
  • Summit Summit
  • Other Other
      Directions to henry-hagg-lake trailhead (45.470060, -123.209050)
      update trails status or condition

      Henry Hagg Lake Trail Reports

      Aug 28, 2019 @ 5:07pm
      Aug 28, 2019
      There has been quite a bit of work done to the trail this year, including adding gravel to some sections, smoothing the trail in others and mowing...
      Jul 27, 2019 @ 2:41pm
      Jul 27, 2019
      Riding well. Trees and brush removed for race last week. Trail markers along trail. Ride now!
      Apr 18, 2019 @ 5:20am
      Apr 18, 2019
      Major Water drainage issue, large mud holes
      Aug 4, 2018 @ 6:28pm
      Aug 4, 2018
      Trail is great. They just had a race on it and cleared all over growth. If you have been hesitating to ride this trail because of all the...
      Feb 4, 2018 @ 12:03pm
      Feb 4, 2018
      A bit sloppy but still fun, there's some decent sections but some hike a bike spots scattered throughout.
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 0 rides
      6 Months
      • 16 rides
      • 13 miles avg distance
      • 30 rides


      more »
      35 |
      Jun 9, 2019 @ 10:49pm
      Jun 9, 2019
      62 |
      Feb 25, 2019 @ 10:13am
      Feb 25, 2019
      54 |
      Feb 25, 2019 @ 10:12am
      Feb 25, 2019
      117 |
      Mar 18, 2018 @ 8:41am
      Mar 18, 2018

      2 Reviews & Comments

      • + 1
      flag 0bLiVi0n (Apr 18, 2019 at 5:17)
       April 18, 2019. Very muddy still,. Entire circuit rideable, but with several dismounts to walk up muddy hills.
      • + 0
      flag russelljdodge (Jun 3, 2019 at 13:36)
       I rode this at the end of May. It's fairly dried up. Some small patches of mud but nothing bad.

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