MTB Project Logo

blue Guam Raceway Park (GRP) Loop

  3.0 ( 1 ) Favorite


4.0 mile 6.5 kilometer loop
20% Singletrack


Ascent: 186' 57 m
Descent: -188' -57 m
High: 562' 171 m
Low: 499' 152 m


Avg Grade: 2% (1°)
Max Grade: 6% (3°)


Driving directions Take a virtual tour
Zoom in to see details
Map Key

Trail shared by MTB Guam


Getting forecast...

Current trail conditions

Unknown See History

Popular rides nearby

Navigate on-trail with our free app

iOS App Store Android App Store

Probably the only place to XC mountain bike during the rainy/monsoon season.

MTB Guam

E-Bikes Unknown

Features -none-

Family Friendly The Guam Raceway Park is primarily a location for motor sports (off-road truck, dirt bike, drifting, drag racing). When there are no motor sports happening, there is a lot of pavement for kids to ride

Must be a member of the Guam Cycling Federation in order to legally ride on these trails. Join the federation here. Open from 8am - 5pm, everyday except Mondays and Wednesdays.


The great thing about this trail is it is rideable year-round. Most of the remaining MTB trails on the island are unrideable during the rainy season due to the abundance of red dirt/clay surface that turns to thick, rust-colored mud that clogs up the rear triangles on your frame preventing the tires from clearing. There is a beautiful photo viewpoint of the eastern coastal area - perfect to take selfies and to take a breather.

Need to Know

Currently, only members of the Guam Cycling Federation, Guam Motorcross Association, and Guam Racing Federation are allowed on the trails. An annual membership for the Guam Cycling Federation is $40 and can be done online at Hours of operation are 8am - 530pm, Tues/Thu/Fri/Sat/Sun.


The trail starts out on part of the off-road track. It is shared with an ATV tour vendor that is a tenant at the raceway. As such, bikers have to follow the trail in the same direction that the ATV tours go - counter clockwise.

After the first climb, then there is a fast descent with a couple of nice bumps to get some air. Then you take a side doubletrack trail that takes you onto the jungle-covered jeep trail. It's rocky, but not technical, and includes a couple of nice rollers. There is one short punchy climb after which you have a choice of an A-line (for riders with a bit more bike handling skills), and the B-line (easier but takes a longer route) that drops into a nice quarry.

Some nice singletrack follow and then you loop back to the start.

History & Background

All the doubletrack on this trail is a shared with an ATV tour operator. The singletrack is only for bikes. The whole park is primarily for motorized sports (moto-x, off-road races) and there is a go-kart track and quarter-mile drag strip on the west side of the park. Plenty of parking.

Biked this trail?

We need help with the following missing trail information:

Dogs Allowed, Features, E-Bikes Allowed


Local Club: MTB Guam

Rate This Featured Ride

Rate Quality

   Clear Rating

Rate Difficulty

Share This Ride

Check In



Trail Ratings

  3.0 from 1 vote


  3.0 from 1 vote
5 Star
4 Star
3 Star
2 Star
1 Star
Featured Ride Rankings


in Guam


16 Views Last Month
82 Since Jan 27, 2019
Intermediate Intermediate



MTB Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Mountain Bike

MTB Project is supported by

Support Your Local IMBA Chapter