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BOSTON MARATHON 2025

Geneva Calder

Bib: 16123•F

BC

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
8:09/mi
25:18
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
51:15
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:17:11
↑ 67↓ 78
20K· 12.43 mi
8:21/mi
1:43:09
↑ 106↓ 860.1%
Half· 13.11 mi
8:15/mi
1:48:47
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
2:08:57
↑ 66↓ 880.2%
30K· 18.64 mi
8:36/mi
2:35:39
↑ 181↓ 1480.2%
20M
9:40/mi
2:48:47
↑ 64↓ 500.2%
21M
10:01/mi
2:58:48
↑ 106↓ 241.6%
35K· 21.75 mi
8:59/mi
3:05:31
↑ 17↓ 861.7%
23M
10:19/mi
3:18:26
↑ 23↓ 630.6%
24M
9:08/mi
3:27:34
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:35:49
↓ 200.3%
25.2M
10:21/mi
3:39:23
↑ 13↓ 160.2%
Finish· 26.22 mi
8:15/mi
3:47:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:47
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:59:00
Pace9:05 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:0925:188:0925:18
8:09
-
10K
6.21 mi11:25:0651:158:1525:57
8:21
+0:12
15K
9.32 mi11:51:021:17:118:1725:56
8:21
0:00
20K
12.43 mi12:17:001:43:098:1825:58
8:21
0:00
Half
13.11 mi12:22:381:48:478:185:38
8:15
-0:06
25K
15.53 mi12:42:482:08:578:1820:10
8:19
+0:04
30K
18.64 mi13:09:302:35:398:2126:42
8:36
+0:17
20M
20.00 mi13:22:382:48:478:2613:08
9:40
+1:04
21M
21.00 mi13:32:392:58:488:3110:01
10:01
+0:21
35K
21.75 mi13:39:223:05:318:326:43
8:59
-1:02
23M
23.00 mi13:52:173:18:268:3812:55
10:19
+1:20
24M
24.00 mi14:01:253:27:348:399:08
9:08
-1:11
40K
24.85 mi14:09:403:35:498:418:15
9:39
+0:31
25.2M
25.20 mi14:13:143:39:238:423:34
10:21
+0:42
Finish
26.22 mi14:21:383:47:478:428:24
8:15
-2:06

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

8:09 /mi

Average Pace

8:42 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:18

11% of race

Time at Steady Pace

2:25:28

64% of race

Time at Slower Pace

57:01

25% of race

Average Pace: 8:41 /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 mi10:59:0925:188:0925:18
8:09
#17697
10K
6.21 mi11:25:0651:158:1525:57
8:21
#18290
15K
9.32 mi11:51:021:17:118:1725:56
8:21
#18288
20K
12.43 mi12:17:001:43:098:1825:58
8:21
#18006
Half
13.11 mi12:22:381:48:478:185:38
8:15
#17970
25K
15.53 mi12:42:482:08:578:1820:10
8:19
#17596
30K
18.64 mi13:09:302:35:398:2126:42
8:36
#17141
20M
20.00 mi13:22:382:48:478:2613:08
9:40
#17388
21M
21.00 mi13:32:392:58:488:3110:01
10:01
#17462
35K
21.75 mi13:39:223:05:318:326:43
8:59
#17477
23M
23.00 mi13:52:173:18:268:3812:55
10:19
#17845
24M
24.00 mi14:01:253:27:348:399:08
9:08
#17832
40K
24.85 mi14:09:403:35:498:418:15
9:39
#17911
25.2M
25.20 mi14:13:143:39:238:423:34
10:21
#17929
Finish
26.22 mi14:21:383:47:478:428:24
8:15
#17787
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi176976153615318376(Top 65%)6539(Top 53%)6539(Top 120%)
10K6.21 mi3.10 mi18290-5936500-3476500-34718896(Top 67%)6821(Top 56%)6821(Top 125%)
15K9.32 mi3.11 mi18288+26500650018376(Top 65%)6539(Top 53%)6539(Top 120%)
20K12.43 mi3.11 mi18006+2826338+1626338+16217299(Top 61%)5944(Top 49%)5944(Top 109%)
Half13.11 mi0.68 mi17970+366321+176321+1717722(Top 62%)6176(Top 51%)6176(Top 113%)
25K15.53 mi2.42 mi17596+3746115+2066115+20616048(Top 56%)5343(Top 44%)5343(Top 98%)
30K18.64 mi3.11 mi17141+4555898+2175898+21715368(Top 54%)5114(Top 42%)5114(Top 94%)
20M20.00 mi1.36 mi17388-2476075-1776075-17719827(Top 70%)7685(Top 63%)7685(Top 141%)
21M21.00 mi1.00 mi17462-746149-746149-7418371(Top 65%)6989(Top 57%)6989(Top 128%)
35K21.75 mi0.75 mi17477-156178-296178-2918142(Top 64%)6978(Top 57%)6978(Top 128%)
23M23.00 mi1.25 mi17845-3686409-2316409-23121478(Top 76%)8798(Top 72%)8798(Top 161%)
24M24.00 mi1.00 mi17832+136442-336442-3318050(Top 64%)7060(Top 58%)7060(Top 129%)
40K24.85 mi0.85 mi17911-796498-566498-5619280(Top 68%)7771(Top 64%)7771(Top 142%)
25.2M25.20 mi0.35 mi17929-186517-196517-1918471(Top 65%)7360(Top 60%)7360(Top 135%)
Finish26.22 mi1.02 mi17787+1426459+586459+5814608(Top 51%)5276(Top 43%)5276(Top 96%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18376

Females

6539

F18-39

6539

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

18896

Females

6821

F18-39

6821

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18376

Females

6539

F18-39

6539

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

17299

Females

5944

F18-39

5944

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17722

Females

6176

F18-39

6176

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

16048

Females

5343

F18-39

5343

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15368

Females

5114

F18-39

5114

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

19827

Females

7685

F18-39

7685

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18371

Females

6989

F18-39

6989

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18142

Females

6978

F18-39

6978

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

21478

Females

8798

F18-39

8798

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

18050

Females

7060

F18-39

7060

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19280

Females

7771

F18-39

7771

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18471

Females

7360

F18-39

7360

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

14608

Females

5276

F18-39

5276

Passing Analysis

Category:
Athletes Passed
2097
Passed By
2187
Net Change
-90
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17697
5K → 10K100693-593#17697#18290
10K → 15K192190+2#18290#18288
15K → 20K33957+282#18288#18006
20K → Half5418+36#18006#17970
Half → 25K38814+374#17970#17596
25K → 30K48530+455#17596#17141
30K → 20M53300-247#17141#17388
20M → 21M81155-74#17388#17462
21M → 35K7085-15#17462#17477
35K → 23M37405-368#17477#17845
23M → 24M8673+13#17845#17832
24M → 40K40119-79#17832#17911
40K → 25.2M1735-18#17911#17929
25.2M → Finish15513+142#17929#17787
TOTALS20972187-90
📊

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