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BOSTON MARATHON 2025

Ziyi Song

Bib: 11885 F CN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 29%
Gender (Female)
#0 / 12228
Top 12%
Division (F18-39)
#0 / 5469
Top 22%
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
7:15/mi
22:33
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:17/mi
45:12
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:24/mi
1:08:10
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:31/mi
1:31:31
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:18/mi
1:36:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:26/mi
1:54:31
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:41/mi
2:18:22
↑ 181↓ 1480.2%
138 ft elev
20M
7:32/mi
2:28:36
↑ 64↓ 500.2%
148 ft elev
21M
7:57/mi
2:36:33
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:10/mi
2:41:55
↑ 17↓ 861.7%
156 ft elev
23M
7:24/mi
2:51:11
↑ 23↓ 630.6%
116 ft elev
24M
7:00/mi
2:58:11
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:03/mi
3:04:13
↓ 200.3%
20 ft elev
25.2M
7:38/mi
3:06:51
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:54/mi
3:13:53
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:36:307:22 /mi⚖️ balanced
2nd Half
1:37:237:26 /mi⚖️ balanced
Even split — consistent pacing between halves
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
22:337:153.11 mi22:33
7:15
-
10K
45:127:163.10 mi22:39
7:17
+0:02
15K
1:08:107:193.11 mi22:58
7:24
+0:07
20K
1:31:317:223.11 mi23:21
7:31
+0:07
Half(13.11 mi)
1:36:307:220.68 mi4:59
7:18
-0:13
25K
1:54:317:222.42 mi18:01
7:26
+0:08
30K
2:18:227:253.11 mi23:51
7:41
+0:15
20M
2:28:367:261.36 mi10:14
7:32
-0:09
21M
2:36:337:271.00 mi7:57
7:57
+0:25
35K
2:41:557:270.75 mi5:22
7:10
-0:47
23M
2:51:117:271.25 mi9:16
7:24
+0:14
24M
2:58:117:251.00 mi7:00
7:00
-0:24
40K
3:04:137:250.85 mi6:02
7:03
+0:03
25.2M
3:06:517:250.35 mi2:38
7:38
+0:35
Finish(26.22 mi)
3:13:537:241.02 mi7:02
6:54
-0:44
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:54 /mi

Average Pace

7:24 /mi

Slowest Pace

7:57 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:39:27

82% of race

Time at Steady Pace

34:26

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:24 /mi

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

Heatmap

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

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi9979179517951080522682268
10K3.10 mi10121-1421870-751870-751027519501950
15K3.11 mi10330-2091988-1181988-1181080522682268
20K3.11 mi10439-1092067-792067-791089124102410
Half(13.11 mi)0.68 mi10400+392061+62061+61006019661966
25K2.42 mi10206+1942003+582003+58939118151815
30K3.11 mi9898+3081906+971906+97903718501850
20M1.36 mi9635+2631828+781828+78723712391239
21M1.00 mi9447+1881777+511777+51710613501350
35K0.75 mi9292+1551728+491728+49648911051105
23M1.25 mi9014+2781646+821646+82609010621062
24M1.00 mi8728+2861559+871559+874680641641
40K0.85 mi8470+2581491+681491+684268583583
25.2M0.35 mi8355+1151460+311460+314136614614
Finish(26.22 mi)1.02 mi8181+1741425+351425+355141914914

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10805

Females

2268

F18-39

2268

5K→10K

3.1 - 6.2 mi

Top 36%
×5story building
+79ft-138ft

Overall

10275

Females

1950

F18-39

1950

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10805

Females

2268

F18-39

2268

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10891

Females

2410

F18-39

2410

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

10060

Females

1966

F18-39

1966

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

9391

Females

1815

F18-39

1815

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

9037

Females

1850

F18-39

1850

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7237

Females

1239

F18-39

1239

20M→21M

20.0 - 21.0 mi

Top 25%
×8story building
+106ft-24ft

Overall

7106

Females

1350

F18-39

1350

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6489

Females

1105

F18-39

1105

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

6090

Females

1062

F18-39

1062

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4680

Females

641

F18-39

641

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4268

Females

583

F18-39

583

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4136

Females

614

F18-39

614

25.2M→Finish

25.2 - 26.2 mi

Top 18%
×2story building
+22ft-21ft

Overall

5141

Females

914

F18-39

914

Passing Analysis

Category:
Passed
2879*
Passed By
1078
Net Change
+1798
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9979
5K → 10K167307-142#9979#10121
10K → 15K113322-209#10121#10330
15K → 20K140248-109#10330#10439
20K → Half5819+39#10439#10400
Half → 25K25056+194#10400#10206
25K → 30K388*80+308#10206#9898
30K → 20M2707+263#9898#9635
20M → 21M20416+188#9635#9447
21M → 35K1627+155#9447#9292
35K → 23M2835+278#9292#9014
23M → 24M2882+286#9014#8728
24M → 40K2591+258#8728#8470
40K → 25.2M1150+115#8470#8355
25.2M → Finish1828+174#8355#8181
TOTALS2879*1078+1798

* Includes athletes who did not complete a segment (DNF/DNQ).

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