Review Date
December 22, 2011

Overall Rating
 4 of 5

Aerobic Difficulty
 2 of 5

Technical Difficulty
 4 of 5

Ridden Trail:
Every few months

Reviewed by: dirty bob ,  Cross Country Rider

Summary:
Cool little park. Only bummer is having to either go out to the road, way out of your way, to ride uphill, or pushing it up a section of the sunset trail to get to the sequoia bayview trail (which is what I do over an over). Preferred loops? Sunset to sequoia bayview, then right on chaparral to the bathroom/parking lot. You can choose the three best DH trails from there: 1 Chaparral (jumps to start and technical, line-picking railroad tie and rock ride), 2 Cinderella (jumps and looney speed... sort of bumpy when I rode last, meh), or 3 Castlepark (normal singletrack in some sections, but the most technical, sliding, hang-on-to-your-bike-and-try-to-stay-on sections in the whole park... AWESOME when you slide down that last section!). After taking one of those three, take a right from cinderella and chaparele or a left from castlepark and ride down the ties/stairs to the sinawak cabin, go over the birdge and take a sharp left to start the sunset loop again, staying on the left side of the creek. first half of it is sweet singletrack, second half is the fire road where you started. Wash, rinse, repeat sweet, sweet downhill loveliness.

Recommended Route:
park on sanborn near the ranger station off of jm road. go into park by going through yellow gate on your left you passed coming in on sanborn (it was on your right coming in). ride across meadow and the big fireroad you hit is sunset. enjoy.

Other recommended trails in the same area:
pleasant hill side of briones from the alhambra staging area.

Review Date
January 29, 2011

Overall Rating
 4 of 5

Aerobic Difficulty
 4 of 5

Technical Difficulty
 3 of 5

Ridden Trail:
Ridden Once

Reviewed by: mountainbikeloco ,  Weekend Warrior

Summary:
I just got turned onto JMP and I really liked it. This park really does have a wide variety of trails, from the wide easy climb of the Sequoia-Bay-view, to the technical/ jump heavy Cinderella, to the narrow creek chaser that is Sinawik. I had a blast on each of them and even though I rode for 14 miles, I didn't even touch Big Trees or Chaparral, so I will definately be back.

Recommended Route:
The trails are all super short so linking them together is a must. Since I am still new to the area, I have not settled on a route, but the beauty of this park is that you can mix up your routes and keep the experience rather fresh.

Review Date
October 13, 2008

Overall Rating
 5 of 5

Aerobic Difficulty
 4 of 5

Technical Difficulty
 5 of 5

Ridden Trail:
Once a week

Reviewed by: CaliforniaNicco ,  Downhiller

Summary:
This is the best place for everthing from XC to MAJOR DH!

Chaparrel - I don't see why ppl are saying its a hiking trail - THIS IS A MAJOR DH TRAIL-from the begging jumps and railroad ties-to the 1ft ruts and skippy logs at the end!

Cinderella - VERY RISKY - lots and lots of 3 ft, flat landing jumps. Couple of 3 ft. railroad tie drops at the end with ruts EVERYWHERE!

All of the fun at JMP starts at the top - park across from Chabot Space and Science Center.

There's even some freeriding around JMP-6ft. stump drop, and a 4 ft. picnic area drop- I'll link pictures soon!

I'm not going to say where all the freeriding is - look for yourself, the city can't find 'em.

Downside: JMP is under the control of the City of Oakland-they can close and open the park whenever they want!

They are known for closing the park for no apparent reason-concerts, "fire danger", other things.

There is very little climbing! A ride a heavy DH bike and do fine.

Recommended Route:
Park at top, ride down Cinderella or Chaparell. - ride left through meadow- take left and ride back up!

Other recommended trails in the same area:
Redwood State- go up from meadow-do the loop counter clockwise from there!

Review Date
October 4, 2008

Overall Rating
 3 of 5

Aerobic Difficulty
 3 of 5

Technical Difficulty
 4 of 5

Ridden Trail:
Every few months

Reviewed by: s1lv3rsc00by ,  Cross Country Rider

Summary:
Only 3 trails worth riding down:

Cinderella - Technical with rocks, roots, and jumps. Not too steep, but fast singletrack downhill run. This is the best trail at JMP.

Chaparral - Somewhat technical and mildly steep in some areas. It's basically like a hiker trail with log steps and some rocky sections.

Lower Sunset Loop trail - it runs parallel between the Sinawik Trail, the creek, and Sunset Trail. This is basically rolling singletrack that hugs the creek side. It flows fast and nice. But then you hit the Palo Colorados Trail which is closed to mtb's and have to climb the Sinawik Trail to get out.

All the other trails I saw seemed to be too short short, double track, fireroads, not technical or steep, or just plain closed to mtb.

Recommended Route:
Shuttle to top. Ride down Cinderella to Sunset to Sunset Loop, then up Sinawilk to the ranger station. Shuttle back up and repeat.

Review Date
March 6, 2008

Overall Rating
 4 of 5

Aerobic Difficulty
 3 of 5

Technical Difficulty
 4 of 5

Ridden Trail:
Every few months

Reviewed by: bstyle74 ,  Cross Country Rider

Summary:
Smallish park that you will want to do over and over and over again. DH sections are awesome, and the climbs aren't hellish. You can shuttle if you have a huge bike. Trails, especially cinderella, can get very overgrown but its a blast.

Watch out for joggers, hikers, and dogs. Very heavy uphill usage, and confrontations are relatively common. Use common courtesy and stay in control.

Recommended Route:
Ride down Big Trees, Cinderella, and Chapperelle.