The event turns the gravel backroads known locally as Dirty Sheets into a supported race weekend that funds regional trail building and maintenance. By MTB Atlanta / North Georgia Mountain Bike Association.
Reputation: A community-built Atlanta-area gravel race known for punchy terrain, hand-made trophies, and an unusually complete race-weekend experience.
The 2026 flagship course adds Moore's Bridge and Serenbe singletrack and doubletrack to the established mixed-surface loop.
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The Course
Photo: YouTube / s y n t h b e n tPhoto: YouTube / s y n t h b e n t
A punchy 100-mile mixed-surface course with 6,815 feet of repeated climbing, moving among pavement, gravel, singletrack, and doubletrack.
Signature challenge: Holding power and handling together across 100 miles, 6,815 feet of repeated climbing, four surface types, and an unmarked GPS course.
20
MILE
Opening Surface Changes
Settle before the course begins stacking gravel and trail sectors onto the early paved miles.
40
MILE
Mid-Race Accumulation
The repeated punchy climbs and changing surfaces begin to compound near the middle of the hundred-mile course.
60
MILE
Late-Course Durability
Fatigue makes the remaining climbs, trail handling, and GPS navigation progressively more expensive.
RIDERS REPORT
Single track section
A little section of single track that adds technical difficulty to the route.
Steep short punchy grades
A couple of pretty steep short punchy grades that are through some chunky rough stuff. Some people have to walk it, some people can power right up it just depends really on the line that you pick.
Features chunky rough stuff on the steep climbs that requires careful line selection.
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From the Field
It's not an easy ride but it's not overly challenging or difficult - there are a couple of challenging sections, there's a little section of single track, there's a couple of pretty steep short punchy grades that are through some chunky rough stuff so some people have to walk it some people can power right up it just depends really on the line that you pick.
Jackelxing · 507 views
It's not an easy ride but it's not overly challenging or difficult there are a couple of challenging sections
Jackelxing · 507 views
Jackelxing · 507 views · 21:50
humantrip · 1.1K views · 2:52
RACER
Racer Reviews
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Training
October 17, 2026 DIRTY SHEETS GRAVEL GRIND
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Train for Dirty Sheets Gravel Grind
RACE DEMAND PROFILE
Durability
6
Climbing
7
VO2 Power
4
Threshold
8
Technical
6
Heat
1
Altitude
2
Race Specificity
6
3 WORKOUTS BUILT FOR THIS RACE
Each workout below is selected from our archetype library based on Dirty Sheets Gravel Grind’s specific demands. Click any workout to see the full execution protocol.
TT ThresholdDescending Threshold
1hr+
20-15-10-5 minute threshold blocks with descending duration — intensity through fatigue.
68ft/mi means long efforts at or near FTP on every climb. If your threshold cracks at minute 15, you'll walk the rest.
EXECUTIONThe intervals get shorter but harder. By the 5-minute block, you’re above FTP on tired legs — this is the finish-line effort. The decreasing rest (5-4-3 min) compounds the fatigue. If you can hold the 5-minute block, you’re race-ready.
POSITIONSeated. Drops for the final 10min and 5min blocks.
RPE20min: 7 | 15min: 7–8 | 10min: 8 | 5min: 9
RACE-SPECIFIC: DIRTY SHEETS GRAVEL GRIND
NUTRITION Target 60–80g carbs/hour for Dirty Sheets Gravel Grind’s 100 miles. Start fueling within the first 30 minutes — early fueling prevents late-race collapse. Bonking at mile 60 is a nutrition failure, not a fitness failure.
TERRAIN Mixed terrain at Dirty Sheets Gravel Grind requires surface adaptability. Include weekly rides on punchy georgia mixed surface to build confidence. Expect: 52% gravel, 48% pavement, punchy rolling climbs.
Gravel SpecificSurge and Settle
1hr+
Explosive surges into tempo settling — the signature gravel-specific workout.
Dirty Sheets Gravel Grind's 52% gravel, 48% pavement forces constant power changes. Surge over the rough stuff, settle on the smooth, repeat for 100 miles.
EXECUTIONOut of the saddle for every surge — explosive, violent power. Then immediately drop to tempo and SETTLE. Smooth your breathing. Recover while still working. This is what gravel racing IS: attack the rock garden, settle on the straight, attack the climb, settle on the descent. Over and over.
POSITIONStanding for surges | Seated in drops for settle
RPESurges: 9–10 | Settle: 5–6
RACE-SPECIFIC: DIRTY SHEETS GRAVEL GRIND
NUTRITION Target 60–80g carbs/hour for Dirty Sheets Gravel Grind’s 100 miles. Start fueling within the first 30 minutes — early fueling prevents late-race collapse. Bonking at mile 60 is a nutrition failure, not a fitness failure.
TERRAIN Mixed terrain at Dirty Sheets Gravel Grind requires surface adaptability. Include weekly rides on punchy georgia mixed surface to build confidence. Expect: 52% gravel, 48% pavement, punchy rolling climbs.
Over UnderLadder Over-Unders
1.1hr+
Over-unders with increasing over-duration — the ladder adds progressive stress.
At Dirty Sheets Gravel Grind, surges push you above threshold and you have to recover while still riding. Over-unders train exactly that.
WU 10m
3m U
30s O
3m U
45s O
3m U
60s O
3m U
75s O
3m U
90s O
CD
STRUCTURE10min warm-up → 5×(3min under @ 90% + ladder over @ 106%: 30s, 45s, 60s, 75s, 90s) → cool-down
EXECUTIONSame under, increasing over. Each rung of the ladder demands more time above threshold. By the 90-second over, your lactate is screaming — and you’re still clearing it at 90% FTP. This builds the lactate tolerance that wins races.
POWERUnders: 88–92% FTP | Overs: 104–108% FTP
CADENCEUnders: 90rpm | Overs: 95–100rpm
POSITIONSeated throughout. Hands on drops during overs.
RPEUnders: 7 | 30s over: 8 | 90s over: 9–10
RACE-SPECIFIC: DIRTY SHEETS GRAVEL GRIND
NUTRITION Target 60–80g carbs/hour for Dirty Sheets Gravel Grind’s 100 miles. Start fueling within the first 30 minutes — early fueling prevents late-race collapse. Bonking at mile 60 is a nutrition failure, not a fitness failure.
TERRAIN Mixed terrain at Dirty Sheets Gravel Grind requires surface adaptability. Include weekly rides on punchy georgia mixed surface to build confidence. Expect: 52% gravel, 48% pavement, punchy rolling climbs.
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Fast center, grippy edges. The modern all-rounder benchmark.
FRONT/REAR SPLITRene Herse Snoqualmie Pass 44mm / Vittoria Terreno Wet 40mmFaster front for reduced rolling resistance on straights, grippier rear for traction on loose climbs and corners
What is the climate like at Dirty Sheets Gravel Grind?
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A mid-October Georgia start usually avoids peak summer heat, but a long day can still move from a cool morning to a warm, humid afternoon. Rain changes the gravel and trail sectors far more than the paved mileage.[1]
How are the logistics for Dirty Sheets Gravel Grind?
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The Serenbe start is roughly 30 miles from Atlanta's airport, with three packet-pickup windows, organizer-directed parking, camping, and clear start waves. Field parking and a rural start keep it below turnkey destination-race logistics.[3]
How adventurous is Dirty Sheets Gravel Grind?
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The course escapes metro Atlanta into rural Chattahoochee Hills, then mixes backroads with wooded singletrack and doubletrack. GPS-only navigation and the surface variety give it more adventure than a standard supported fondo.[2]
How prestigious is Dirty Sheets Gravel Grind?
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2024 results show Brock Mason winning the 102-mile in 4:52:50, with 16th place Logan Hunt finishing in 7:45:23—a nearly three-hour spread indicating regional competition rather than elite depth. The $3,000 prize purse split between men and women suggests ambition exceeding current field strength.[5]
Should I race Dirty Sheets Gravel Grind?
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Yes if you want a fully supported, legitimately hard Southeast mixed-surface race without the destination-race circus; no if national field depth is the main attraction.
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Sources & Citations
Research sources used to build this race profile. Always verify details with official race sources before making travel or registration decisions.