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BOSTON MARATHON 2025

Catherine Irons

Bib: 11096•F

VA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Female)
#0 / 12228
Top 10%
Division (F18-39)
#0 / 5469
Top 19%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:41
Rank: #10382
Start → 5K
22:41 | 7:18/mi
10K· 6.21 mi
45:25
Rank: #10421 (-39)
5K → 10K
22:44 | 7:19/mi
15K· 9.32 mi
1:07:47
Rank: #9968 (+453)
10K → 15K
22:22 | 7:12/mi
20K· 12.43 mi
1:30:14
Rank: #9510 (+458)
15K → 20K
22:27 | 7:14/mi
Half· 13.11 mi
1:35:08
Rank: #9465 (+45)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:52:40
Rank: #9160 (+305)
Half → 25K
17:32 | 7:14/mi
30K· 18.64 mi
2:15:34
Rank: #8615 (+545)
25K → 30K
22:54 | 7:22/mi
20M
2:25:29
Rank: #8333 (+282)
30K → 20M
9:55 | 7:18/mi
21M
2:33:19
Rank: #8140 (+193)
20M → 21M
7:50 | 7:50/mi
35K· 21.75 mi
2:38:29
Rank: #7955 (+185)
21M → 35K
5:10 | 6:54/mi
23M
2:47:44
Rank: #7762 (+193)
35K → 23M
9:15 | 7:23/mi
24M
2:55:01
Rank: #7665 (+97)
23M → 24M
7:17 | 7:17/mi
40K· 24.85 mi
3:01:38
Rank: #7644 (+21)
24M → 40K
6:37 | 7:44/mi
25.2M
3:04:35
Rank: #7650 (-6)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:12:29
Rank: #7740 (-90)
25.2M → Finish
7:54 | 7:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:08
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:37:21
Pace7:26 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2822:417:1822:41
7:18
-
10K
6.21 mi11:12:1245:257:1922:44
7:19
+0:01
15K
9.32 mi11:34:341:07:477:1622:22
7:12
-0:07
20K
12.43 mi11:57:011:30:147:1622:27
7:14
+0:02
Half
13.11 mi12:01:551:35:087:154:54
7:11
-0:03
25K
15.53 mi12:19:271:52:407:1517:32
7:14
+0:03
30K
18.64 mi12:42:212:15:347:1622:54
7:22
+0:08
20M
20.00 mi12:52:162:25:297:169:55
7:18
-0:04
21M
21.00 mi13:00:062:33:197:187:50
7:50
+0:32
35K
21.75 mi13:05:162:38:297:175:10
6:54
-0:56
23M
23.00 mi13:14:312:47:447:189:15
7:23
+0:29
24M
24.00 mi13:21:482:55:017:187:17
7:17
-0:06
40K
24.85 mi13:28:253:01:387:186:37
7:44
+0:27
25.2M
25.20 mi13:31:223:04:357:192:57
8:33
+0:49
Finish
26.22 mi13:39:163:12:297:217:54
7:45
-0:48

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

6:54 /mi

Average Pace

7:21 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:10

3% of race

Time at Steady Pace

2:42:01

84% of race

Time at Slower Pace

25:18

13% of race

Average Pace: 7:20 /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 mi10:49:2822:417:1822:41
7:18
#10382
10K
6.21 mi11:12:1245:257:1922:44
7:19
#10421
15K
9.32 mi11:34:341:07:477:1622:22
7:12
#9968
20K
12.43 mi11:57:011:30:147:1622:27
7:14
#9510
Half
13.11 mi12:01:551:35:087:154:54
7:11
#9465
25K
15.53 mi12:19:271:52:407:1517:32
7:14
#9160
30K
18.64 mi12:42:212:15:347:1622:54
7:22
#8615
20M
20.00 mi12:52:162:25:297:169:55
7:18
#8333
21M
21.00 mi13:00:062:33:197:187:50
7:50
#8140
35K
21.75 mi13:05:162:38:297:175:10
6:54
#7955
23M
23.00 mi13:14:312:47:447:189:15
7:23
#7762
24M
24.00 mi13:21:482:55:017:187:17
7:17
#7665
40K
24.85 mi13:28:253:01:387:186:37
7:44
#7644
25.2M
25.20 mi13:31:223:04:357:192:57
8:33
#7650
Finish
26.22 mi13:39:163:12:297:217:54
7:45
#7740
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10382197619769123(Top 32%)1476(Top 12%)1476(Top 27%)
10K6.21 mi3.10 mi10421-392014-382014-3810492(Top 37%)2052(Top 17%)2052(Top 38%)
15K9.32 mi3.11 mi9968+4531828+1861828+1869123(Top 32%)1476(Top 12%)1476(Top 27%)
20K12.43 mi3.11 mi9510+4581645+1831645+1838429(Top 30%)1282(Top 10%)1282(Top 23%)
Half13.11 mi0.68 mi9465+451631+141631+148979(Top 32%)1480(Top 12%)1480(Top 27%)
25K15.53 mi2.42 mi9160+3051525+1061525+1067850(Top 28%)1159(Top 9%)1159(Top 21%)
30K18.64 mi3.11 mi8615+5451342+1831342+1836899(Top 24%)973(Top 8%)973(Top 18%)
20M20.00 mi1.36 mi8333+2821263+791263+795812(Top 20%)740(Top 6%)740(Top 14%)
21M21.00 mi1.00 mi8140+1931224+391224+396416(Top 23%)1069(Top 9%)1069(Top 20%)
35K21.75 mi0.75 mi7955+1851182+421182+424829(Top 17%)567(Top 5%)567(Top 10%)
23M23.00 mi1.25 mi7762+1931160+221160+226018(Top 21%)1028(Top 8%)1028(Top 19%)
24M24.00 mi1.00 mi7665+971151+91151+96343(Top 22%)1201(Top 10%)1201(Top 22%)
40K24.85 mi0.85 mi7644+211180-291180-298365(Top 29%)2148(Top 18%)2148(Top 39%)
25.2M25.20 mi0.35 mi7650-61199-191199-199126(Top 32%)2563(Top 21%)2563(Top 47%)
Finish26.22 mi1.02 mi7740-901252-531252-5311099(Top 39%)3497(Top 29%)3497(Top 64%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

9123

Females

1476

F18-39

1476

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

10492

Females

2052

F18-39

2052

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

9123

Females

1476

F18-39

1476

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8429

Females

1282

F18-39

1282

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8979

Females

1480

F18-39

1480

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7850

Females

1159

F18-39

1159

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6899

Females

973

F18-39

973

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5812

Females

740

F18-39

740

20M→21M

20.0 - 21.0 mi

Top 23%
×8stories
+106ft-24ft

Overall

6416

Females

1069

F18-39

1069

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4829

Females

567

F18-39

567

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

6018

Females

1028

F18-39

1028

23M→24M

23.0 - 24.0 mi

Top 22%
×6stories
+12ft-82ft

Overall

6343

Females

1201

F18-39

1201

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

8365

Females

2148

F18-39

2148

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9126

Females

2563

F18-39

2563

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

11099

Females

3497

F18-39

3497

Passing Analysis

Category:
Athletes Passed
3290*
Passed By
648
Net Change
+2642
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10382
5K → 10K240279-39#10382#10421
10K → 15K479*26+453#10421#9968
15K → 20K47214+458#9968#9510
20K → Half5914+45#9510#9465
Half → 25K33025+305#9465#9160
25K → 30K56318+545#9160#8615
30K → 20M2864+282#8615#8333
20M → 21M20411+193#8333#8140
21M → 35K1883+185#8140#7955
35K → 23M20613+193#7955#7762
23M → 24M11619+97#7762#7665
24M → 40K8463+21#7665#7644
40K → 25.2M2935-6#7644#7650
25.2M → Finish34124-90#7650#7740
TOTALS3290*648+2642

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

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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