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BOSTON MARATHON 2023

Chrissy Coffin

Bib: 19143•F

TX

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
8:26/mi
26:11
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
52:10
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:17:44
↑ 67↓ 78
20K· 12.43 mi
9:14/mi
1:46:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:37/mi
1:52:18
↑ 19↓ 370.5%
25K· 15.53 mi
9:54/mi
2:16:17
↑ 66↓ 880.2%
30K· 18.64 mi
15:15/mi
3:03:41
↑ 181↓ 1480.2%
20M
15:15/mi
3:24:25
↑ 64↓ 500.2%
21M
15:15/mi
3:39:40
↑ 106↓ 241.6%
35K· 21.75 mi
15:15/mi
3:51:05
↑ 17↓ 861.7%
23M
11:00/mi
4:04:51
↑ 23↓ 630.6%
24M
11:00/mi
4:15:51
↓ 821.3%
40K· 24.85 mi
12:53/mi
4:26:52
↓ 200.3%
25.2M
13:03/mi
4:31:22
↑ 13↓ 160.2%
Finish· 26.22 mi
11:17/mi
4:42:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:18
Pace8:34 /mi
2nd Half
Distance13.11 mi
Time2:50:34
Pace13:01 /mi
📊Positive Split: 51.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:5226:118:2626:11
8:26
-
10K
6.21 mi11:49:5152:108:2425:59
8:22
-0:04
15K
9.32 mi12:15:251:17:448:2025:34
8:14
-0:08
20K
12.43 mi12:44:061:46:258:3428:41
9:14
+1:00
Half
13.11 mi12:49:591:52:188:345:53
8:37
-0:37
25K
15.53 mi13:13:582:16:178:4623:59
9:54
+1:17
30K
18.64 mi14:01:223:03:419:5147:24
15:15
+5:21
20M
20.00 mi14:22:063:24:2510:1320:44
15:15
0:00
21M
21.00 mi14:37:213:39:4010:2815:15
15:15
0:00
35K
21.75 mi14:48:463:51:0510:3811:25
15:15
0:00
23M
23.00 mi15:02:324:04:5110:3913:46
11:00
-4:15
24M
24.00 mi15:13:324:15:5110:4011:00
11:00
0:00
40K
24.85 mi15:24:334:26:5210:4411:01
12:53
+1:53
25.2M
25.20 mi15:29:034:31:2210:464:30
13:03
+0:10
Finish
26.22 mi15:40:334:42:5210:4811:30
11:17
-1:46

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

8:14 /mi

Average Pace

10:48 /mi

Slowest Pace

15:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:18

40% of race

Time at Steady Pace

1:00:15

21% of race

Time at Slower Pace

1:50:19

39% of race

Average Pace: 10:47 /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 mi11:23:5226:118:2626:11
8:26
#17096
10K
6.21 mi11:49:5152:108:2425:59
8:22
#17192
15K
9.32 mi12:15:251:17:448:2025:34
8:14
#16793
20K
12.43 mi12:44:061:46:258:3428:41
9:14
#17982
Half
13.11 mi12:49:591:52:188:345:53
8:37
#17999
25K
15.53 mi13:13:582:16:178:4623:59
9:54
#18962
30K
18.64 mi14:01:223:03:419:5147:24
15:15
#22453
20M
20.00 mi14:22:063:24:2510:1320:44
15:15
#23129
21M
21.00 mi14:37:213:39:4010:2815:15
15:15
#23408
35K
21.75 mi14:48:463:51:0510:3811:25
15:15
#23683
23M
23.00 mi15:02:324:04:5110:3913:46
11:00
#23615
24M
24.00 mi15:13:324:15:5110:4011:00
11:00
#23595
40K
24.85 mi15:24:334:26:5210:4411:01
12:53
#23689
25.2M
25.20 mi15:29:034:31:2210:464:30
13:03
#23703
Finish
26.22 mi15:40:334:42:5210:4811:30
11:17
#23744
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi170965997599716093(Top 60%)5352(Top 47%)5352(Top 110%)
10K6.21 mi3.10 mi17192-966050-536050-5317349(Top 65%)6095(Top 53%)6095(Top 125%)
15K9.32 mi3.11 mi16793+3995790+2605790+26016093(Top 60%)5352(Top 47%)5352(Top 110%)
20K12.43 mi3.11 mi17982-11896509-7196509-71920719(Top 78%)8073(Top 71%)8073(Top 165%)
Half13.11 mi0.68 mi17999-176513-46513-418542(Top 70%)6818(Top 60%)6818(Top 140%)
25K15.53 mi2.42 mi18962-9637098-5857098-58521979(Top 83%)8829(Top 77%)8829(Top 181%)
30K18.64 mi3.11 mi22453-34919091-19939091-199326487(Top 99%)11352(Top 99%)11352(Top 232%)
20M20.00 mi1.36 mi23129-6769463-3729463-37226374(Top 99%)11316(Top 99%)11316(Top 232%)
21M21.00 mi1.00 mi23408-2799613-1509613-15025876(Top 97%)11040(Top 97%)11040(Top 226%)
35K21.75 mi0.75 mi23683-2759766-1539766-15326449(Top 99%)11347(Top 99%)11347(Top 232%)
23M23.00 mi1.25 mi23615+689734+329734+3222346(Top 84%)9246(Top 81%)9246(Top 189%)
24M24.00 mi1.00 mi23595+209734973423069(Top 87%)9674(Top 85%)9674(Top 198%)
40K24.85 mi0.85 mi23689-949799-659799-6524853(Top 93%)10601(Top 93%)10601(Top 217%)
25.2M25.20 mi0.35 mi23703-149808-99808-924059(Top 90%)10223(Top 89%)10223(Top 209%)
Finish26.22 mi1.02 mi23744-419837-299837-2924422(Top 92%)10369(Top 91%)10369(Top 212%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

16093

Females

5352

F18-39

5352

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17349

Females

6095

F18-39

6095

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

16093

Females

5352

F18-39

5352

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20719

Females

8073

F18-39

8073

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18542

Females

6818

F18-39

6818

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

21979

Females

8829

F18-39

8829

25K→30K

15.5 - 18.6 mi

Top 99%
×9story building
+181ft-148ft

Overall

26487

Females

11352

F18-39

11352

30K→20M

18.6 - 20.0 mi

Top 99%
×5story building
+64ft-50ft

Overall

26374

Females

11316

F18-39

11316

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

25876

Females

11040

F18-39

11040

21M→35K

21.0 - 21.8 mi

Top 99%
×7story building
+17ft-86ft

Overall

26449

Females

11347

F18-39

11347

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22346

Females

9246

F18-39

9246

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

23069

Females

9674

F18-39

9674

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

24853

Females

10601

F18-39

10601

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

24059

Females

10223

F18-39

10223

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2story building
+22ft-21ft

Overall

24422

Females

10369

F18-39

10369

Passing Analysis

Category:
Athletes Passed
960
Passed By
7608
Net Change
-6648
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17096
5K → 10K272368-96#17096#17192
10K → 15K46162+399#17192#16793
15K → 20K271216-1189#16793#17982
20K → Half2340-17#17982#17999
Half → 25K13976-963#17999#18962
25K → 30K13492-3491#18962#22453
30K → 20M4680-676#22453#23129
20M → 21M3282-279#23129#23408
21M → 35K2277-275#23408#23683
35K → 23M8012+68#23683#23615
23M → 24M4323+20#23615#23595
24M → 40K8102-94#23595#23689
40K → 25.2M923-14#23689#23703
25.2M → Finish1455-41#23703#23744
TOTALS9607608-6648
📊

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