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BOSTON MARATHON 2025

Brittni Smith

IL

Bib: 11423 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 10%
Division (F18-39)
#0 / 5469
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:24/mi
22:59
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:18/mi
45:41
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:14/mi
1:08:10
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:16/mi
1:30:44
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:09/mi
1:35:37
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:13/mi
1:53:08
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:18/mi
2:15:49
↑ 181↓ 1480.2%
138 ft elev
20M
7:18/mi
2:25:44
↑ 64↓ 500.2%
148 ft elev
21M
7:39/mi
2:33:23
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:48/mi
2:38:28
↑ 17↓ 861.7%
156 ft elev
23M
7:10/mi
2:47:26
↑ 23↓ 630.6%
116 ft elev
24M
7:06/mi
2:54:32
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:23/mi
3:00:51
↓ 200.3%
20 ft elev
25.2M
8:30/mi
3:03:47
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:36/mi
3:11:32
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:35:37
Pace7:18 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:35:55
Pace7:19 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:2822:597:2422:59
7:24
-
10K
6.21 mi11:18:1045:417:2122:42
7:18
-0:06
15K
9.32 mi11:40:391:08:107:1922:29
7:14
-0:04
20K
12.43 mi12:03:131:30:447:1822:34
7:16
+0:02
Half
13.11 mi12:08:061:35:377:184:53
7:09
-0:07
25K
15.53 mi12:25:371:53:087:1717:31
7:13
+0:04
30K
18.64 mi12:48:182:15:497:1722:41
7:18
+0:05
20M
20.00 mi12:58:132:25:447:179:55
7:18
0:00
21M
21.00 mi13:05:522:33:237:187:39
7:39
+0:21
35K
21.75 mi13:10:572:38:287:175:05
6:48
-0:51
23M
23.00 mi13:19:552:47:267:178:58
7:10
+0:22
24M
24.00 mi13:27:012:54:327:167:06
7:06
-0:04
40K
24.85 mi13:33:203:00:517:176:19
7:23
+0:17
25.2M
25.20 mi13:36:163:03:477:182:56
8:30
+1:07
Finish
26.22 mi13:44:013:11:327:197:45
7:36
-0:54

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

6:48 /mi

Average Pace

7:19 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

12:11

6% of race

Time at Steady Pace

2:41:01

84% of race

Time at Slower Pace

18:20

10% of race

Average Pace: 7:18 /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 mi10:55:2822:597:2422:59
7:24
#11274
10K
6.21 mi11:18:1045:417:2122:42
7:18
#10780
15K
9.32 mi11:40:391:08:107:1922:29
7:14
#10321
20K
12.43 mi12:03:131:30:447:1822:34
7:16
#9879
Half
13.11 mi12:08:061:35:377:184:53
7:09
#9811
25K
15.53 mi12:25:371:53:087:1717:31
7:13
#9419
30K
18.64 mi12:48:182:15:497:1722:41
7:18
#8707
20M
20.00 mi12:58:132:25:447:179:55
7:18
#8426
21M
21.00 mi13:05:522:33:237:187:39
7:39
#8166
35K
21.75 mi13:10:572:38:287:175:05
6:48
#7942
23M
23.00 mi13:19:552:47:267:178:58
7:10
#7664
24M
24.00 mi13:27:012:54:327:167:06
7:06
#7509
40K
24.85 mi13:33:203:00:517:176:19
7:23
#7393
25.2M
25.20 mi13:36:163:03:477:182:56
8:30
#7401
Finish
26.22 mi13:44:013:11:327:197:45
7:36
#7480
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi1127424182418941116131613
10K6.21 mi3.10 mi10780+4942197+2212197+2211037920072007
15K9.32 mi3.11 mi10321+4591985+2121985+212941116131613
20K12.43 mi3.11 mi9879+4421813+1721813+172871214071407
Half13.11 mi0.68 mi9811+681782+311782+31864013611361
25K15.53 mi2.42 mi9419+3921641+1411641+141776211301130
30K18.64 mi3.11 mi8707+7121375+2661375+2666448818818
20M20.00 mi1.36 mi8426+2811304+711304+715732724724
21M21.00 mi1.00 mi8166+2601234+701234+705342715715
35K21.75 mi0.75 mi7942+2241178+561178+564019413413
23M23.00 mi1.25 mi7664+2781118+601118+604627572572
24M24.00 mi1.00 mi7509+1551102+161102+165168796796
40K24.85 mi0.85 mi7393+1161084+181084+18607711841184
25.2M25.20 mi0.35 mi7401-81103-191103-19870024112411
Finish26.22 mi1.02 mi7480-791167-641167-64990329622962

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

9411

Females

1613

F18-39

1613

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

10379

Females

2007

F18-39

2007

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

9411

Females

1613

F18-39

1613

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8712

Females

1407

F18-39

1407

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

8640

Females

1361

F18-39

1361

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7762

Females

1130

F18-39

1130

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6448

Females

818

F18-39

818

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5732

Females

724

F18-39

724

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

5342

Females

715

F18-39

715

21M→35K

21.0 - 21.8 mi

Top 14%
×7story building
+17ft-86ft

Overall

4019

Females

413

F18-39

413

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4627

Females

572

F18-39

572

23M→24M

23.0 - 24.0 mi

Top 18%
×6story building
+12ft-82ft

Overall

5168

Females

796

F18-39

796

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

6077

Females

1184

F18-39

1184

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8700

Females

2411

F18-39

2411

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

9903

Females

2962

F18-39

2962

Passing Analysis

Category:
Athletes Passed
4133
Passed By
339
Net Change
+3794
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11274
5K → 10K58894+494#11274#10780
10K → 15K47617+459#10780#10321
15K → 20K46119+442#10321#9879
20K → Half724+68#9879#9811
Half → 25K40311+392#9811#9419
25K → 30K7197+712#9419#8707
30K → 20M2821+281#8707#8426
20M → 21M2622+260#8426#8166
21M → 35K2240+224#8166#7942
35K → 23M2813+278#7942#7664
23M → 24M16712+155#7664#7509
24M → 40K13216+116#7509#7393
40K → 25.2M2432-8#7393#7401
25.2M → Finish42121-79#7401#7480
TOTALS4133339+3794

Passing Charts

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