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BOSTON MARATHON 2025

Cordelia Roberts

Bib: 27241•F

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:26/mi
29:20
↑ 97↓ 3451.5%
10K· 6.21 mi
9:06/mi
57:37
↑ 79↓ 1380.4%
15K· 9.32 mi
9:07/mi
1:25:55
↑ 67↓ 78
20K· 12.43 mi
8:51/mi
1:53:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:59:08
↑ 19↓ 370.5%
25K· 15.53 mi
8:50/mi
2:20:34
↑ 66↓ 880.2%
30K· 18.64 mi
9:13/mi
2:49:13
↑ 181↓ 1480.2%
20M
8:53/mi
3:01:17
↑ 64↓ 500.2%
21M
9:55/mi
3:11:12
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
3:17:34
↑ 17↓ 861.7%
23M
8:51/mi
3:28:39
↑ 23↓ 630.6%
24M
8:42/mi
3:37:21
↓ 821.3%
40K· 24.85 mi
8:39/mi
3:44:45
↓ 200.3%
25.2M
9:31/mi
3:48:02
↑ 13↓ 160.2%
Finish· 26.22 mi
7:58/mi
3:56:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:59:08
Pace9:05 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:57:01
Pace8:56 /mi
📊Negative Split: 1.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:3329:209:2629:20
9:26
-
10K
6.21 mi12:19:5057:379:1628:17
9:06
-0:20
15K
9.32 mi12:48:081:25:559:1328:18
9:07
+0:01
20K
12.43 mi13:15:371:53:249:0727:29
8:51
-0:16
Half
13.11 mi13:21:211:59:089:055:44
8:24
-0:27
25K
15.53 mi13:42:472:20:349:0321:26
8:50
+0:26
30K
18.64 mi14:11:262:49:139:0528:39
9:13
+0:23
20M
20.00 mi14:23:303:01:179:0412:04
8:53
-0:20
21M
21.00 mi14:33:253:11:129:069:55
9:55
+1:02
35K
21.75 mi14:39:473:17:349:056:22
8:31
-1:24
23M
23.00 mi14:50:523:28:399:0411:05
8:51
+0:20
24M
24.00 mi14:59:343:37:219:038:42
8:42
-0:09
40K
24.85 mi15:06:583:44:459:037:24
8:39
-0:03
25.2M
25.20 mi15:10:153:48:029:033:17
9:31
+0:52
Finish
26.22 mi15:18:223:56:099:018:07
7:58
-1:33

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:58 /mi

Average Pace

9:01 /mi

Slowest Pace

9:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

20:13

9% of race

Time at Steady Pace

1:28:10

37% of race

Time at Slower Pace

2:07:46

54% of race

Average Pace: 9:00 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:51:3329:209:2629:20
9:26
#24041
10K
6.21 mi12:19:5057:379:1628:17
9:06
#23453
15K
9.32 mi12:48:081:25:559:1328:18
9:07
#23172
20K
12.43 mi13:15:371:53:249:0727:29
8:51
#22471
Half
13.11 mi13:21:211:59:089:055:44
8:24
#22297
25K
15.53 mi13:42:472:20:349:0321:26
8:50
#21774
30K
18.64 mi14:11:262:49:139:0528:39
9:13
#21227
20M
20.00 mi14:23:303:01:179:0412:04
8:53
#20871
21M
21.00 mi14:33:253:11:129:069:55
9:55
#20662
35K
21.75 mi14:39:473:17:349:056:22
8:31
#20520
23M
23.00 mi14:50:523:28:399:0411:05
8:51
#20241
24M
24.00 mi14:59:343:37:219:038:42
8:42
#20079
40K
24.85 mi15:06:583:44:459:037:24
8:39
#19882
25.2M
25.20 mi15:10:153:48:029:033:17
9:31
#19812
Finish
26.22 mi15:18:223:56:099:018:07
7:58
#19582
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi240419716971622493(Top 79%)8826(Top 72%)8826(Top 161%)
10K6.21 mi3.10 mi23453+5889393+3239393+32322837(Top 80%)9035(Top 74%)9035(Top 165%)
15K9.32 mi3.11 mi23172+2819228+1659228+16522493(Top 79%)8826(Top 72%)8826(Top 161%)
20K12.43 mi3.11 mi22471+7018846+3828846+38220197(Top 71%)7588(Top 62%)7588(Top 139%)
Half13.11 mi0.68 mi22297+1748764+828764+8218668(Top 66%)6727(Top 55%)6727(Top 123%)
25K15.53 mi2.42 mi21774+5238481+2838481+28319169(Top 67%)7064(Top 58%)7064(Top 129%)
30K18.64 mi3.11 mi21227+5478205+2768205+27618754(Top 66%)6988(Top 57%)6988(Top 128%)
20M20.00 mi1.36 mi20871+3568029+1768029+17616155(Top 57%)5697(Top 47%)5697(Top 104%)
21M21.00 mi1.00 mi20662+2097939+907939+9018007(Top 63%)6801(Top 56%)6801(Top 124%)
35K21.75 mi0.75 mi20520+1427876+637876+6315596(Top 55%)5586(Top 46%)5586(Top 102%)
23M23.00 mi1.25 mi20241+2797754+1227754+12215445(Top 54%)5579(Top 46%)5579(Top 102%)
24M24.00 mi1.00 mi20079+1627679+757679+7515805(Top 56%)5823(Top 48%)5823(Top 106%)
40K24.85 mi0.85 mi19882+1977594+857594+8514422(Top 51%)5214(Top 43%)5214(Top 95%)
25.2M25.20 mi0.35 mi19812+707562+327562+3214807(Top 52%)5477(Top 45%)5477(Top 100%)
Finish26.22 mi1.02 mi19582+2307459+1037459+10312706(Top 45%)4299(Top 35%)4299(Top 79%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

22493

Females

8826

F18-39

8826

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22837

Females

9035

F18-39

9035

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

22493

Females

8826

F18-39

8826

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

20197

Females

7588

F18-39

7588

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18668

Females

6727

F18-39

6727

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

19169

Females

7064

F18-39

7064

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18754

Females

6988

F18-39

6988

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16155

Females

5697

F18-39

5697

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

18007

Females

6801

F18-39

6801

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15596

Females

5586

F18-39

5586

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

15445

Females

5579

F18-39

5579

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

15805

Females

5823

F18-39

5823

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14422

Females

5214

F18-39

5214

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14807

Females

5477

F18-39

5477

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12706

Females

4299

F18-39

4299

Passing Analysis

Category:
Athletes Passed
4616
Passed By
157
Net Change
+4459
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24041
5K → 10K63951+588#24041#23453
10K → 15K34564+281#23453#23172
15K → 20K7032+701#23172#22471
20K → Half1740+174#22471#22297
Half → 25K5285+523#22297#21774
25K → 30K56114+547#21774#21227
30K → 20M3560+356#21227#20871
20M → 21M22112+209#20871#20662
21M → 35K1442+142#20662#20520
35K → 23M2801+279#20520#20241
23M → 24M1653+162#20241#20079
24M → 40K2003+197#20079#19882
40K → 25.2M700+70#19882#19812
25.2M → Finish2300+230#19812#19582
TOTALS4616157+4459
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing