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BOSTON MARATHON 2025

Courtney Blackwell

Bib: 12329•F

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 41%
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
7:15/mi
22:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:22/mi
45:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:08:44
↑ 67↓ 78
20K· 12.43 mi
7:43/mi
1:32:44
↑ 106↓ 860.1%
Half· 13.11 mi
7:31/mi
1:37:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:46/mi
1:56:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:05/mi
2:21:48
↑ 181↓ 1480.2%
20M
8:15/mi
2:33:01
↑ 64↓ 500.2%
21M
8:46/mi
2:41:47
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:47:40
↑ 17↓ 861.7%
23M
8:14/mi
2:57:59
↑ 23↓ 630.6%
24M
8:11/mi
3:06:10
↓ 821.3%
40K· 24.85 mi
8:18/mi
3:13:16
↓ 200.3%
25.2M
8:54/mi
3:16:20
↑ 13↓ 160.2%
Finish· 26.22 mi
7:53/mi
3:24:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:52
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:46:30
Pace8:07 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0622:337:1522:33
7:15
-
10K
6.21 mi11:12:5945:267:1922:53
7:22
+0:07
15K
9.32 mi11:36:171:08:447:2223:18
7:30
+0:08
20K
12.43 mi12:00:171:32:447:2824:00
7:43
+0:13
Half
13.11 mi12:05:251:37:527:285:08
7:31
-0:12
25K
15.53 mi12:24:151:56:427:3118:50
7:46
+0:15
30K
18.64 mi12:49:212:21:487:3625:06
8:05
+0:19
20M
20.00 mi13:00:342:33:017:3911:13
8:15
+0:10
21M
21.00 mi13:09:202:41:477:428:46
8:46
+0:31
35K
21.75 mi13:15:132:47:407:435:53
7:52
-0:54
23M
23.00 mi13:25:322:57:597:4410:19
8:14
+0:22
24M
24.00 mi13:33:433:06:107:458:11
8:11
-0:03
40K
24.85 mi13:40:493:13:167:477:06
8:18
+0:07
25.2M
25.20 mi13:43:533:16:207:473:04
8:54
+0:36
Finish
26.22 mi13:51:553:24:227:488:02
7:53
-1:01

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

7:15 /mi

Average Pace

7:48 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:52

36% of race

Time at Steady Pace

1:21:51

40% of race

Time at Slower Pace

48:39

24% of race

Average Pace: 7:48 /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 mi10:50:0622:337:1522:33
7:15
#9987
10K
6.21 mi11:12:5945:267:1922:53
7:22
#10447
15K
9.32 mi11:36:171:08:447:2223:18
7:30
#10840
20K
12.43 mi12:00:171:32:447:2824:00
7:43
#11334
Half
13.11 mi12:05:251:37:527:285:08
7:31
#11364
25K
15.53 mi12:24:151:56:427:3118:50
7:46
#11450
30K
18.64 mi12:49:212:21:487:3625:06
8:05
#11481
20M
20.00 mi13:00:342:33:017:3911:13
8:15
#11476
21M
21.00 mi13:09:202:41:477:428:46
8:46
#11498
35K
21.75 mi13:15:132:47:407:435:53
7:52
#11488
23M
23.00 mi13:25:322:57:597:4410:19
8:14
#11469
24M
24.00 mi13:33:433:06:107:458:11
8:11
#11465
40K
24.85 mi13:40:493:13:167:477:06
8:18
#11488
25.2M
25.20 mi13:43:533:16:207:473:04
8:54
#11463
Finish
26.22 mi13:51:553:24:227:488:02
7:53
#11465
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi99871803180311778(Top 41%)2786(Top 23%)2786(Top 51%)
10K6.21 mi3.10 mi10447-4602030-2272030-22710893(Top 38%)2253(Top 18%)2253(Top 41%)
15K9.32 mi3.11 mi10840-3932245-2152245-21511778(Top 41%)2786(Top 23%)2786(Top 51%)
20K12.43 mi3.11 mi11334-4942516-2712516-27112633(Top 44%)3344(Top 27%)3344(Top 61%)
Half13.11 mi0.68 mi11364-302536-202536-2011989(Top 42%)2939(Top 24%)2939(Top 54%)
25K15.53 mi2.42 mi11450-862623-872623-8712090(Top 43%)3161(Top 26%)3161(Top 58%)
30K18.64 mi3.11 mi11481-312723-1002723-10011948(Top 42%)3263(Top 27%)3263(Top 60%)
20M20.00 mi1.36 mi11476+52765-422765-4212186(Top 43%)3536(Top 29%)3536(Top 65%)
21M21.00 mi1.00 mi11498-222815-502815-5012106(Top 43%)3651(Top 30%)3651(Top 67%)
35K21.75 mi0.75 mi11488+102835-202835-2011328(Top 40%)3280(Top 27%)3280(Top 60%)
23M23.00 mi1.25 mi11469+192868-332868-3311660(Top 41%)3558(Top 29%)3558(Top 65%)
24M24.00 mi1.00 mi11465+42897-292897-2912471(Top 44%)4025(Top 33%)4025(Top 74%)
40K24.85 mi0.85 mi11488-232946-492946-4912174(Top 43%)3996(Top 33%)3996(Top 73%)
25.2M25.20 mi0.35 mi11463+252950-42950-411236(Top 40%)3610(Top 30%)3610(Top 66%)
Finish26.22 mi1.02 mi11465-22988-382988-3812072(Top 43%)3960(Top 32%)3960(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11778

Females

2786

F18-39

2786

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10893

Females

2253

F18-39

2253

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11778

Females

2786

F18-39

2786

15K→20K

9.3 - 12.4 mi

Top 44%
×5story building
+106ft-86ft

Overall

12633

Females

3344

F18-39

3344

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11989

Females

2939

F18-39

2939

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

12090

Females

3161

F18-39

3161

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11948

Females

3263

F18-39

3263

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12186

Females

3536

F18-39

3536

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

12106

Females

3651

F18-39

3651

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11328

Females

3280

F18-39

3280

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11660

Females

3558

F18-39

3558

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12471

Females

4025

F18-39

4025

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12174

Females

3996

F18-39

3996

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11236

Females

3610

F18-39

3610

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2story building
+22ft-21ft

Overall

12072

Females

3960

F18-39

3960

Passing Analysis

Category:
Athletes Passed
1298
Passed By
2774
Net Change
-1478
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9987
5K → 10K86544-460#9987#10447
10K → 15K84477-393#10447#10840
15K → 20K68562-494#10840#11334
20K → Half2252-30#11334#11364
Half → 25K136222-86#11364#11450
25K → 30K219250-31#11450#11481
30K → 20M126121+5#11481#11476
20M → 21M93115-22#11476#11498
21M → 35K6454+10#11498#11488
35K → 23M11596+19#11488#11469
23M → 24M9086+4#11469#11465
24M → 40K6891-23#11465#11488
40K → 25.2M5126+25#11488#11463
25.2M → Finish7678-2#11463#11465
TOTALS12982774-1478
📊

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